Ericson, David B. The ever-changing sea / David B. Ericson and Goesta Wollin - New York : Alferd A Knoph, 1967. - xiii, 354, xii p. : ill. ; 24 cm. Includes index. Bibliography: p. 351-354. ISBN: LCCN: 71395537 Subjects--Topical Terms: Oceanography LC Class. No.: GC21 / .E73 1968 Dewey Class. No.: 333 / ERE