Advances in organic geochemistry : proceedings of the international meeting in Milan, 1962 / edited by Umberto Colombo and G.D. Hobson. Geochemical Society. Organic Geochemistry Group. European Branch. Colombo, Umberto, 1927- ed. Hobson, George Douglas, ed. Organic geochemistry Congresses. QE515 .G385 1962 551.9 ADV Includes bibliographical references and indexes. New York : Macmillan, c1964. c1964. 1964 Text ix, 488 p. : eng International series of monographs on earth sciences, monograph no. 15. [from old catalog]