Simpson, George Gaylord. The meaning of Evolution= a study of the history of life and of its significance for man/ by George Gaylord Simpson. - 7th printing. - New Haven : Yale University Press, 1949 - XV, 364 p. : il. ; 21 cm. - The meaning of Evolution . evolution Subjects--Personal Names: GEORGE GAYLORD SIMPSON Subjects--Topical Terms: Evoluci�onEvolution (Biology) Dewey Class. No.: 575 / s613 Universal Decimal Class. No.: 575.8