@book{ BA83456183, author = "Chapman, Charles F.", title = "Piloting, seamanship and small boat handling : a complete illustrated course prepared especially to develop skill, pleasure and safety in the navigation of small boats on coastal and inland waters", publisher = "Motor Boating", year = "1968", edition = "1969-70 ed. 47th. year", URL = "https://ci.nii.ac.jp/ncid/BA83456183" }