Hours of work in coal mines
Subtitle: Item II on the agenda.
Contributors: International labor conference (15th : 1931 : Geneva)
Publisher: International labour office
Published: 1930
Place of publication: Geneva
Language: eng
Number of pages: 91
Subjects: Coal mines and mining.; Hours of labor.; Coal miners.
Notes: At head of title: Questionnaire. International labour conference. Fifteenth session. Geneva--May, 1931.