Simpson, George Gaylord, 1902-1984.
Tempo and mode in evolution / by George Gaylord Simpson. - New York : Columbia University Press, c1944. - xviii, 237 p. : ill. ; 24 cm. - Columbia biological series ; no. 15 .
Includes bibliographical references (p. [219]-226) and index.
a 45000404
Evolution.
QH366 / .S59
575 / SIT
Tempo and mode in evolution / by George Gaylord Simpson. - New York : Columbia University Press, c1944. - xviii, 237 p. : ill. ; 24 cm. - Columbia biological series ; no. 15 .
Includes bibliographical references (p. [219]-226) and index.
a 45000404
Evolution.
QH366 / .S59
575 / SIT