Tairo gyogyō konponsaku kenkyū shiryō
Subtitle: Shōwa 6-nen 5-gatsu teisei (Shōwa 5-nen 9-gatsu chōsa)
Publisher: s.n.
Published: 1931
Place of publication: Japan
Language: jpn
Number of pages: 44
Notes: Cover title.

Issued as confidential document.