Senate executive documents, 81st Congress, 1st session. G. Convention concerning statistics of wages and hours of work in principal mining and manufacturing industries, message from President of United States transmitting authenticated copy of text of convention concerning stastitics of wages and hours of work in principal mining and manufacturing industries, including building and construction, and in agriculture (no. 63), adopted by International Labor Conference at its 24th session held at Geneva, June 2-22, 1938.