00805cam a2200229 4500 133502272 TxAuBib 20001007120000.0 001007s1978||||||||||||||||||||||||und|u 79124181 9780806115139 $9.95 0806115130 $9.95 TxAuBib Knowles, Ruth Sheldon, 1915- The greatest gamblers : the epic of American oil exploration / Ruth Sheldon Knowles. 2d ed. Norman : University of Oklahoma Press, 1978. xii, 376 p., [6] leaves of plates : ill. ; 22 cm. Includes bibliographical references and index. 20001007. Petroleum industry and trade United States History.