@phdthesis{oai:tcue.repo.nii.ac.jp:00001117,
 author = {秋葉, 健 and Akiba, Takeshi},
 month = {2020-05-15, 2020-05-15},
 note = {2019},
 school = {高崎経済大学},
 title = {旅客鉄道事業の損益分岐点と輸送密度の研究},
 year = {},
 yomi = {アキバ, タケシ}
}