The process of evolution / Paul R. Ehrlich, Richard W. Holm [and] Dennis R. Parnell. Ehrlich, Paul R. Holm, Richard W., joint author. Parnell, Dennis R., joint author. Evolution (Biology) Genetics. Evolution. Genetics. QH366.2 .E35 1974 575 EHP Includes bibliographical references and index. New York : McGraw-Hill, 1974. 1974. 1974 Text xv, 378 p. : eng McGraw-Hill series in population biology