Shortened URLs are numbered sequentially; the related long URLs are listed below for reference.
Chapter 1
01-01 https://commons.wikimedia.org/wiki/File:FallPando02.jpg
01-02 http://www.nps.gov/brca/naturescience/quakingaspen.htm
01-03 http://www.jstor.org/stable/1312652
01-04 http://trentwalton.com/2012/02/02/redefined/
01-05 http://www.fieldmuseum.org/
01-06 http://www.audubon.org/
01-07 http://cooking.nytimes.com/guides/how-to-make-pie-crust
01-08 http://laphamsquarterly.org/
01-09 http://www.microsoft.com/
01-10 https://www.virginamerica.com/
01-11 http://www.adobe.com/
01-12 https://www.gov.uk/
01-13 https://playbook.cio.gov/
01-14 http://www.google.com/trends/2014/
01-15 http://abookapart.com/products/responsive-web-design
01-16 http://responsivewebdesign.com/podcast/capital-one-part-two.html
01-17 http://responsivewebdesign.com/podcast/virgin-america.html
01-18 http://ushahidi.github.io/platform-pattern-library/
01-19 http://ux.mailchimp.com/patterns
01-20 http://www.starbucks.com/static/reference/styleguide/
01-21 http://patterns.alistapart.com/
01-22 https://commons.wikimedia.org/wiki/File:HMS_Dauntless_D33.jpg
01-23 http://us5.campaign-archive2.com/?u=7e093c5cf4&id=ead8a72012&e=ecb25a3f93
01-25 http://www.comscore.com/Insights/Blog/Is-Mobile-Bringing-About-the-Death-of-the-PC-Not-Exactly
01-26 http://www.pcmag.com/article2/0,2817,2375047,00.asp
01-27 http://ben-evans.com/benedictevans/2014/4/25/ipad-growth
01-29 http://www.reuters.com/article/2014/11/14/us-google-glass-insight-idUSKCN0IY18E20141114
01-30 https://play.google.com/store/apps/details?id=com.appfour.wearbrowser
01-31 https://www.youtube.com/watch?v=sGo08-SP_Ww
01-32 http://www.digitaltrends.com/computing/windows-8-1-preview-review/
01-33 http://www.ofcom.org.uk/static/cmr-10/UKCM-4.13.html
01-34 https://www.flickr.com/photos/anna_debenham/19700844223
01-35 http://www.ericsson.com/res/docs/2014/ericsson-mobility-report-november-2014.pdf
01-36 https://www.flickr.com/photos/ericsson_images/15626948657/in/set-72157649326666221
Chapter 2
02-01 http://www.nlm.nih.gov/exhibition/avoyagetohealth/exhibition-legacy.html
02-02 http://happycog.com/
02-03 http://responsivenews.co.uk/post/18948466399/cutting-the-mustard
02-04 http://responsivenews.co.uk/post/50028612882/responsive-news-testing
02-05 https://github.com/filamentgroup/Overthrow/
02-06 http://www.lukew.com/ff/entry.asp?1514
02-08 https://github.com/filamentgroup/Ajax-Include-Pattern/
02-09 http://www.filamentgroup.com/lab/responsive-design-approach-for-navigation.html
02-10 https://developer.mozilla.org/en-US/Apps/Design/UI_layout_basics/Responsive_Navigation_Patterns
02-11 https://www.quora.com/Who-started-the-trend-of-using-the-hamburger-icon-%E2%98%B0-as-a-menu-button
02-12 http://www.bbc.com/news/magazine-31602745
02-13 https://raygun.io/blog/2014/07/making-svg-html-burger-button/
02-14 http://sarasoueidan.com/blog/navicon-transformicons/
02-15 http://time.com
02-16 http://exisweb.net/mobile-menu-abtest
02-18 http://blog.booking.com/hamburger-menu.html
02-19 http://blog.manbolo.com/2014/06/30/apple-on-hamburger-menus
02-20 http://www.lukew.com/ff/entry.asp?933
02-21 http://www.bbc.com/news
02-22 http://www.theguardian.com/help/insideguardian/2014/jul/11/-sp-navigating-the-guardian
02-23 http://responsivewebdesign.com/podcast/virgin-america.html
02-24 https://the-pastry-box-project.net/dan-mall/2012-september-12
02-25 http://blog.mailchimp.com/redesigning-mailchimps-app-navigation/
02-26 https://www.filamentgroup.com/
02-27 http://frankchimero.com/blog/
Chapter 3
03-01 http://the.hitchcock.zone/wiki/Alfred_Hitchcock_and_Fran%C3%A7ois_Truffaut_%28Aug/1962%29_-_Part_2
03-02 http://clagnut.com/blog/268/
03-03 http://www.bbc.com/news/business-33436021
03-04 http://unstoppablerobotninja.com/entry/hand-over-the-ring/
03-05 http://thisismadebyhand.com/
03-06 http://alistapart.com/article/creating-intrinsic-ratios-for-video
03-07 http://www.w3.org/TR/css3-box/#padding1
03-08 http://www.paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/
03-09 http://virb.com/
03-10 http://vox.com/
03-11 http://httparchive.org/interesting.php?a=All&l=Jul%201%202015
03-12 http://googlesystem.blogspot.com/2010/07/googles-stats-about-web.html
03-13 http://blog.cloudfour.com/how-apple-com-will-serve-retina-images-to-new-ipads/
03-14 https://w3c.github.io/netinfo/
03-15 https://youtube.com/watch?v=d5_6yHixpsQ
03-16 http://www.gq.com/
03-17 http://digiday.com/publishers/gq-com-cut-page-load-time-80-percent/
03-18 http://ricg.io/
03-19 https://html.spec.whatwg.org/multipage/embedded-content.html#attr-img-srcset
03-21 https://status.modern.ie/imgsrcset
03-22 https://github.com/scottjehl/picturefill
03-23 http://www.vox.com/2014/12/29/7458807/paul-krugman-economist
03-24 http://engineering.columbia.edu/model-created-map-energy-use-nyc-buildings
03-25 http://www.lars-mueller-publishers.com/en/programme-entwerfen
03-26 http://needmoredesigns.com/blog/early-responsive-design/
03-27 https://flic.kr/p/s7maT2
03-28 https://github.com/adamdbradley/focal-point
03-29 https://www.shopify.com/
Chapter 4
04-01 http://depts.washington.edu/chinaciv/graph/tcommain.htm
04-02 http://www.teleactivities.com/advertising-history/
04-03 http://blogs.ubc.ca/etec540sept10/2010/11/29/the-evolution-of-advertising-from-papyrus-to-youtube/
04-04 http://espressocoffee.quora.com/Coffee-timeline-A-literary-record
04-05 http://www.web-books.com/Classics/ON/B0/B701/15MB701.html
04-06 https://commons.wikimedia.org/wiki/File:Times_1788年12月04日.jpg
04-07 https://www.flickr.com/photos/nesster/5511185739/
04-08 https://www.flickr.com/photos/42072348@N00/3049739879/
04-09 https://www.flickr.com/photos/91591049@N00/16587189580/
04-10 https://www.flickr.com/photos/nesster/14959218130/
04-11 https://www.flickr.com/photos/nesster/4822903313/
04-12 http://www.iab.net/guidelines/508676/508767/displayguidelines
04-13 http://www.iab.net/guidelines/508676/508767/mobileguidelines
04-14 https://github.com/filamentgroup/AppendAround
04-16 http://markboulton.co.uk/journal/responsive-advertising
04-17 http://rogerblack.com/blog/post/the_holy_grail_part_i
04-18 http://rogerblack.com/blog/post/the_holy_grail_part_2
04-19 https://www.thinkwithgoogle.com/research-studies/the-new-multi-screen-world-study.html
04-20 http://responsivewebdesign.com/podcast/vox.html
04-21 http://advertising.theguardian.com/gallery/
04-22 http://next.theguardian.com/blog/responsive-takeover/
04-23 http://htmlads.monotype.com/
04-24 https://support.google.com/adsense/answer/3543893
Chapter 5
05-01 http://trentwalton.com/2012/02/02/redefined/
05-02 http://responsivewebdesign.com/podcast/virgin-america.html
05-03 http://upstatement.com/blog/2012/01/how-to-approach-a-responsive-design/
05-04 http://getbootstrap.com/
05-05 http://foundation.zurb.com/
05-06 http://whitney.org/
05-07 http://www.experimentaljetset.nl/archive/whitney-museum-identity
05-08 https://archive.org/details/LittleNemo1905-1914ByWinsorMccay
05-09 https://www.youtube.com/watch?v=I-9FIFDHjLg
05-10 https://www.youtube.com/watch?v=1uLWbuButIE
05-11 https://www.youtube.com/watch?v=lmVra1mW7LU
05-12 https://www.youtube.com/watch?v=ws5kGs_J-CM
05-13 https://vimeo.com/93206523
05-14 http://the12principles.tumblr.com/
05-15 http://www.frankanollie.com/PhysicalAnimation.html
05-17 http://www.markboulton.co.uk/journal/anewcanon
05-18 http://owltastic.com/
05-19 http://tattly.com/products/burger
05-20 http://www.fieldmuseum.org/
05-21 https://developer.mozilla.org/en-US/docs/Web/CSS/flex
05-22 http://www.bondartscience.com
05-23 http://www.sbnation.com/a/march-madness-2014
05-24 http://alistapart.com/article/content-out-layout
05-26 http://responsivewebdesign.com/podcast/
05-27 https://developer.chrome.com/home/platform-pillar
05-28 http://convergese.com/
05-29 http://www.theguardian.com/
05-30 http://jakearchibald.com/2014/dont-use-flexbox-for-page-layout/
05-31 https://www.flickr.com/photos/cjmartin/8916609941/
Resources
06-01 http://responsivewebdesign.com/podcast/marriott.html
06-02 http://responsivewebdesign.com/podcast/code-for-america.html
06-03 http://responsivewebdesign.com/podcast/capital-one.html
06-04 http://responsivewebdesign.com/podcast/ushahidi.html
06-05 http://alistapart.com/article/creating-style-guides
06-06 http://maban.co.uk/projects/front-end-style-guides/
06-07 http://styleguides.io/podcast/index.html
06-08 http://alistapart.com/article/responsive-images-how-they-almost-worked-and-what-we-need
06-09 http://alistapart.com/article/responsive-images-in-practice
06-10 https://dev.opera.com/articles/native-responsive-images/
06-11 http://www.abookapart.com/products/responsible-responsive-design
06-12 http://www.flexboxin5.com/
06-13 https://developer.mozilla.org/en-US/docs/Web/Guide/CSS/Flexible_boxes
06-14 https://css-tricks.com/snippets/css/a-guide-to-flexbox/
06-15 http://www.w3.org/TR/css3-grid-layout/
06-16 http://rachelandrew.co.uk/presentations/css-grid
06-18 http://gridbyexample.com/
06-19 http://pvs.kcc.hawaii.edu/holokai/1976/ben_finney.html
06-21 http://en.wikipedia.org/wiki/Mau_Piailug
06-22 http://www.atlasobscura.com/places/pando-the-trembling-giant
06-23 http://www.smithsonianmag.com/science-nature/whats-killing-the-aspen-93130832/?all