Judson, Sheldon. Physical geology / Sheldon Judson, Kenneth S. Deffeyes, Robert B. Hargraves. - Englewood Cliffs, N.J. : Prentice-Hall, c1976. - xiii, 560 p. : ill. ISBN: 0136696554 Subjects--Topical Terms: Physical geology. Dewey Class. No.: 551/J93