The Ecology of the seas / D. H. Cushing and J. J. Walsh. Cushing, D. H. Walsh, John Joseph, 1942- Marine ecology. QH541.5.S3 E25 574.5 CUE Includes indexes. Bibliography: p. 409-446. Philadelphia : W. B. Saunders Co., c1976. c1976. 1976 Text x, 467 p. : eng