01170cam a22002891 4500 l 39000015 DLC 20260227111536.0 781101s1938 sz a 001 0 eng l 39000015 (OCoLC)4337002 DLC CoDU OCoLC DLC premarc HD4813 .I4 ser. B, no. 31 International Labour Office The world coal-mining industry ... Geneva, 1938. 2 v. tables, diagrs. (part fold.) 24 cm. Its Studies and reports, Series B (Economic conditions) no. 31 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." v. 1. Economic conditions.-- v. 2. Social conditions. Coal mines and mining. Coal miners. Coal trade. International Labour Office. Studies and reports, Series B (Economic conditions) no. 31. 36283 36283