Seikei Seihō tankō rōdōryoku chōsa.
Contributors: Japan. Taishikan (Hua pei cheng wu wei yüan hui)
Series: Chōsajo chōsa shiryō ;; dai 265-gō.; Kōsei ;; dai 9-gō; Chōsajo chōsa shiryō ;; dai 265-gō.; Chōsajo chōsa shiryō.; dai 9-gō.
Publisher: Pekin Dai Nippon Teikoku Taishikan
Published: 1942
Place of publication: [Pekin]
Language: jpn
Number of pages: 192
Subjects: Coal-miners -- China -- Ching-hsing hsien.; Coal mines and mining -- China -- Ching-hsing hsien.
Notes: Cover title.
Stamped as confidential document.