Introduction to geology, physical and historical / by, William Lee Stokes and Sheldon Judson. Stokes, William Lee, 1915-1994. Judson, Sheldon, author. Geology. QE26 .S83 550.1 STI Includes Index. Includes bibliographies. Englewood Cliffs, N.J. : Prentice-Hall, c1968. c1968. 1968 Text xii, 530 p. : eng