Honpō sekitan kōgyō tōmen no mondai
Publisher: Sekitan Kōgyō Rengōkai
Published: 1932
Place of publication: Tōkyō
Language: jpn
Number of pages: 32
Subjects: Coal mines and mining
Other titles: Sekitan jihō. Dai 7-kan, dai 11-gō (Supplement)
Notes: Cover title.

"Sekitan jihō dai 7-kan dai 11-gō furoku."