Fields, H. H., Perry, J. H., & Deul, M. (1975). Commercial-quality gas from the multipurpose borehole located in the Pittsburgh coalbed. U.S. Dept. of the Interior, Bureau of Mines.
Chicago Style (17th ed.) CitationFields, Herbert H., John H. Perry, and Maurice Deul. Commercial-quality Gas from the Multipurpose Borehole Located in the Pittsburgh Coalbed. [Washington]: U.S. Dept. of the Interior, Bureau of Mines, 1975.
MLA (9th ed.) CitationFields, Herbert H., et al. Commercial-quality Gas from the Multipurpose Borehole Located in the Pittsburgh Coalbed. U.S. Dept. of the Interior, Bureau of Mines, 1975.
Warning: These citations may not always be 100% accurate.