Chūshi ni okeru suidō jōka sagyō no kaizen ni kansuru chōsa
Series: Kachū chōsa shiryō -- dai 475-gō
Publisher: Kōain Kachū Renrakubu
Published: 1942
Place of publication: [Shanghai]
Language: jpn
Number of pages: 57
Subjects: Water; Water-supply; Sewage; Purification
Notes: Cover title.

Issued as confidential document.