Jeffreys, Harold Sir The earth its origin, history and physical constitution. - 3d ed. - Cambridge [Eng.] University Press 1952. - xi, 392 p. illus. Bibliography: p. 377-388. LCCN: 91061984 Nat. Bib. No.: B*** Subjects--Geographic Terms: Earth LC Class. No.: QE501 / .J4 1970 Dewey Class. No.: 551