Sekitan sōgi
By: Rōdō Sōgi Chōsakai hen
Series: Sengo rōdō sōgi jittai chōsa -- 1; Sengo rōdō sōgi jittai chōsa -- 1.
Publisher: Chūō Kōronsha
Published: 1957
Place of publication: Tōkyō
Language: jpn
Number of pages: 384
Subjects: Coal mines and minging; Labor disputes