Text ( visual ) : unmediated U.S. tornadoes : 70-year statistics / T. Theodore Fujita. -- pt. 1. -- Chicago, Ill. : Satellite and Mesometeorology Research Project, Dept. of the Geophysical Sciences, University of Chicago , c1987. -- 120 p. : ill. (some col.), maps (some col.) ; 29 cm. -- (SMRP research paper ; no. 218). -- "National Technical Information Service PB 87-127742" ; Includes bibliographical references. -- (BC13683527) ; https://ci.nii.ac.jp/ncid/BC13683527 Other Title(s): US tornadoes. -- Author Heading(s): Fujita, Tetsuya Theodore. -- Classification(s): LCC : QC981 ; LCC : QC955.5.U6 ; DC19 : 551.5 s ; DC19 : 551.5/53/0973. -- Subject Heading(s): LCSH : Tornadoes -- United States -- Charts, diagrams, etc