International Labour Organisation Programme of Industrial Activities. (1975). General Report: ecent Events and Developments in Mines Other than Coal Mines: Third Tripartite Technical Meeting for Mines Other than Coal Mines. Geneva: International Labour Office.
Chicago-tyylinen lähdeviittausInternational Labour Organisation Programme of Industrial Activities. General Report: Ecent Events and Developments in Mines Other Than Coal Mines: Third Tripartite Technical Meeting for Mines Other Than Coal Mines. Geneva: International Labour Office, 1975.
MLA-viiteInternational Labour Organisation Programme of Industrial Activities. General Report: Ecent Events and Developments in Mines Other Than Coal Mines: Third Tripartite Technical Meeting for Mines Other Than Coal Mines. Geneva: International Labour Office, 1975.