@article{oai:waseda.repo.nii.ac.jp:00012063,
 author = {Sugiyama, Masahiro and 杉山, 雅洋},
 journal = {早稲田商学=The Waseda commercial review},
 month = {Aug},
 pages = {13--39},
 title = {交通における時間の評価について},
 volume = {238号},
 year = {1973}
}