@article{oai:ismrepo.ism.ac.jp:00032567,
 author = {青山, 博次郎 and Aoyama, Hirojiro},
 issue = {1},
 journal = {統計数理研究所彙報},
 month = {Mar},
 pages = {63--70},
 title = {野鳥の鳴声},
 volume = {27},
 year = {1980}
}