@article{oai:repository.dl.itc.u-tokyo.ac.jp:00025356,
 author = {ISHIDA, Ken},
 journal = {東京大学農学部演習林報告},
 month = {},
 pages = {91--100},
 title = {Black Bear Populationatthe Mountain Road Construction Areain Chichibu, Central Japan},
 volume = {105},
 year = {2001}
}