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,Demand-responsive transportation systems,,"Highway Research Board, National Research Council",1973,Highway Research Board special report,,0309020999,,https://cir.nii.ac.jp/crid/1130282273362433024