石炭窒素製造業
By: henshū Rōdōshō Shokugyō Anteikyoku
Series: Shokumu kaisetsu -- dai 109-shū
Publisher: Rōdōshō Shokugyō Anteikyoku
Published: 1951
Place of publication: Tokyo]
Language: jpn
Number of pages: 323
Subjects: Coal mines and mining; Job descriptions; Employees; Vocational qualifications
Other titles: Sekitan chisso seizōgyō
Notes: Cover title.