@misc{oai:tokyo-metro-u.repo.nii.ac.jp:00004491,
 author = {オカ, シュウイチ and 岡, 秀一 and Oka, Shuichi},
 month = {Mar},
 note = {東京都立大学, 1991-03-14, 理学博士, 乙第758号},
 title = {Climatological and Vegatational Studies on the Forest Limit in Japanese Mountains},
 year = {1991}
}