West Penn Cement Co & Morrison, G. A. (1931). Mining and crushing methods and costs at West Penn Cement Company, limestone mine, West Winfield, Pa. [publisher not identified].
Chicago Style (17th ed.) CitationWest Penn Cement Co and George A. Morrison. Mining and Crushing Methods and Costs at West Penn Cement Company, Limestone Mine, West Winfield, Pa. Washington, D.C.: [publisher not identified], 1931.
MLA (9th ed.) CitationWest Penn Cement Co and George A. Morrison. Mining and Crushing Methods and Costs at West Penn Cement Company, Limestone Mine, West Winfield, Pa. [publisher not identified], 1931.
Warning: These citations may not always be 100% accurate.