Hokushi shotanden tanshitsu tekisei chōsa hōkokusho
Subtitle: Yōsen tankō
Contributors: Mantetsu Hokushi Keizai Chōsajo
Publisher: Mantetsu Hokushi Keizai Chōsajo
Published: 1940
Place of publication: [Peking]
Language: jpn
Subjects: Coal; Analysis
Notes: Cover title.

Prepared by Izawa Zenji. Cf. Pref.

Confidential document (stamped).

"Ho No. 218; Hokkeigen 16; Otsuritsubun E31; In 200."