@misc{oai:obihiro.repo.nii.ac.jp:00004036,
 author = {Oshida, Tatsuo and 押田, 龍夫 and Yanagawa, Hisashi and 柳川, 久},
 month = {Oct},
 note = {application/pdf},
 title = {「外来リス問題」をご存知ですか？},
 year = {2004}
}