The world coal-mining industry 
Series: Its Studies and reports, Series B (Economic conditions); no. 31
Published: 1938
Place of publication: Geneva
Language: eng
Subjects: Coal mines and mining.; Coal miners.; Coal trade.
Notes: At head of title: International labour office ...
"Originally prepared and distributed in proof as a 'white' report, intended to serve as a basis for discussion at the Technical tripartite conference on the coal-minimg industry ... in Geneva in May 1938."
Table of contents: title: v. 1. Economic conditions.; title: v. 2. Social conditions.