Denkyoku kōgyō no genjō chōsa
Series: Shiryō -- dai 89-gō; Shiryō (Sangyō Keizai Kenkyūjo) -- dai 89-gō.
Publisher: Sangyō Keizai Kenkyūjo
Published: 1942
Place of publication: Tōkyō
Language: jpn
Number of pages: 67
Notes: Cover title.

Issued as confidential document.