Bujun Tankō Manjin jūjiin gentai chōsa
Subtitle: Sekitan Ekika Kōjō no bu
Publisher: Bujun Tankō] Sōmukyoku Shomuka Chōsagakari
Published: 1941
Place of publication: [Bujun
Language: jpn
Number of pages: 11
Subjects: Coal liquefaction; Coal miners
Notes: Caption title.