著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Takashi HAKAMADA,An outline of the Density Surface Model for estimating abundance of baleen whales undertaken by the Institute of Cetacean Research,Technical reports of the Institute of Cetacean Research,24336084,Tokyo : Institute of Cetacean Research,2021-12,,5,43-48,https://cir.nii.ac.jp/crid/1520291856316155136,