United States. Bureau of Mines. (1939). Carbonizing properties and petrographic composition of Pittsburgh-Ưbed coal from Bureau of Mines Experimental Mine, Bruceton, Allegheny County, Pa. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Mines. Carbonizing Properties and Petrographic Composition of Pittsburgh-Ưbed Coal from Bureau of Mines Experimental Mine, Bruceton, Allegheny County, Pa. [Washington]: [s.n.], 1939.
MLA (9th ed.) CitationUnited States. Bureau of Mines. Carbonizing Properties and Petrographic Composition of Pittsburgh-Ưbed Coal from Bureau of Mines Experimental Mine, Bruceton, Allegheny County, Pa. [s.n.], 1939.
Warning: These citations may not always be 100% accurate.