@misc{oai:obihiro.repo.nii.ac.jp:00003709,
 author = {Ohtomo, Koh-ichi and 大友, 功一},
 month = {Jun},
 note = {application/pdf, 助成番号121},
 title = {播種・管理専用トラクタの研究},
 year = {1979}
}