Ashiyoro dōbutsu kasekigun Kenkyū no kiroku
Subtitle: desumosuchirusu no senzo behemotopusu to Nihon saiko no kujira
Publisher: Hokkaidō Ashiyoro-chō Kyōiku Iinkai
Published: 1989
Place of publication: Hokkaidō Ashiyoro-chō
Language: jpn
Number of pages: 201