Title: Hatarakumono no Hokkaidō hyakunen shi.
Authors: Takahashi, Shinʼichi, 1913-1985; Hokkaidō Rekishi Kyōikusha Kyōgikai.
Publisher: Rōdō Junpōsha,
Year: 1969
Subjects: Working class Japan Hokkaido History.; Hokkaido (Japan) History.