Daidō tanden no tanshitsu oyobi tanryō chūkan hōkoku
Publisher: Mantetsu Chōsabu Daiyon Chōsashitsu
Published: 1939
Place of publication: [Dairen]
Language: jpn
Subjects: Coal mines and mining
Notes: Confidential document (stamped).

Vol. 1: "Tsuketari, kaorin no hinshitsu oyobi maizōryō." "Ho No. 405; Chōshichō 17; Otsushibun 320-18; In 100; Zōin 100."