United States. Bureau of Mines. (1937). Relative value of gypsum and anhydrite as additions to Portland cement. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Relative Value of Gypsum and Anhydrite as Additions to Portland Cement. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Relative Value of Gypsum and Anhydrite as Additions to Portland Cement. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.