Franklin

MLA

Mines Department. Coal Mining Industry. Quarterly Statistical Summary of Output, and of the Costs of Production, Proceeds and Profits of the Coal Mining Industry for the Quarter Ended 30th June, 1939. Cambridge [eng.]: Proquest LLC, 2007.

APA

(2007). Mines Department. Coal mining industry. Quarterly statistical summary of output, and of the costs of production, proceeds and profits of the coal mining industry for the quarter ended 30th June, 1939. Cambridge [eng.]: Proquest LLC.

Chicago

Mines Department. Coal Mining Industry. Quarterly Statistical Summary of Output, and of the Costs of Production, Proceeds and Profits of the Coal Mining Industry for the Quarter Ended 30th June, 1939. Cambridge [eng.]: Proquest LLC, 2007.