Elements of petroleum geology / Richard C. Selley. Selley, Richard C., 1939- Petroleum Geology. Natural gas Geology. TN870.5 .S425 1985 552.282 19 S467 e Includes bibliographical references and index. New York : W.H. Freeman and Co., c1985. c1985. 1985 Text xii, 449 p., [8] p. of plates : eng