... Short papers from the Cooperative Oil-Shale Laboratory - Gavin, Martin Joseph, 1894-; Sharp, Leslie H.; United States. Bureau of Mines (Denver, Col., Eames brothers, state printers, 1921)
At head of title: State of Colorado. Cooperative Oil Shale Investigation (in cooperation with the United States Bureau of mines) Martin J. Gavin, engineer in charge.
Keywords: Oil-shales.; Petroleum -- Colorado