Bujun tankō sōgō keiei kiso chōsa
Subtitle: Shizenteki jōken : Sekitan, Bujuntan no seishitsu
Publisher: Bujun Tankō Sōmukyoku Shomuka Chōsagakari
Published: 1940
Place of publication: [Bujun
Language: jpn
Number of pages: 30
Subjects: Coal; Composition
Notes: Caption title.

Confidential document (stamped).