Kōjō rōdōsha idō shirabe
Subtitle: Shōwa 5-nen 1-gatsubun yori Shōwa 5-nen 5-gatsubun ni itaru
Publisher: Shakaikyoku Shakaibu
Published: 1930
Place of publication: [Tokyo]
Language: jpn
Number of pages: 35
Subjects: Working class; Statistics; Labor mobility; Factories
Notes: Cover title.