Crust of the earth : a symposium. Arie Poldervaart, Editor Poldervaart, Arie, 1918-1964, ed. QE511 .P6 551.13 POC Papers prepared for the symposium held on October 14, 15 and 16, 1954, organized by the Dept. of Geology of Columbia University. Includes bibliographical references and index. New York : Geological Society of America, 1955. 1955. 1955 Text viii, 762 p. : eng Geological Society of America. Special paper 62 Special papers (Geological Society of America) 62. Earth (Planet) Surface Congresses.