Kōzan saigai no kenkyū
By: Tsuchiya Chōichi
Series: Kyōdō Chōsakai hōkoku -- dai 7-gō
Publisher: Kyōdō Chōsakai
Published: 1923
Place of publication: [Japan
Language: jpn
Number of pages: 134
Subjects: Mine accidents
Notes: Cover title.

On double leaves.

Includes bibliographical references (p. [3-4] (1st group)).