著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL National Research Council (U.S.). Highway Research Board,"Highway sufficiency ratings : presented at the thirty-first annual meeting, January 1952",,Highway Research Board,1952,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000796756355072