Martinez, G. M., Gomes, J. M., & Wong, M. M. (1981). Recovery of byproduct heavy minerals from sand and gravel operations in Oregon and Washington. U.S. Dept. of the Interior, Bureau of Mines.
Chicago Style (17th ed.) CitationMartinez, G. M., J. M. Gomes, and M. M. Wong. Recovery of Byproduct Heavy Minerals from Sand and Gravel Operations in Oregon and Washington. [Washington, D.C.?]: U.S. Dept. of the Interior, Bureau of Mines, 1981.
MLA (9th ed.) CitationMartinez, G. M., et al. Recovery of Byproduct Heavy Minerals from Sand and Gravel Operations in Oregon and Washington. U.S. Dept. of the Interior, Bureau of Mines, 1981.
Warning: These citations may not always be 100% accurate.