By Conant, James Bryant.
Cambridge Harvard University Press 1953 .
xii, 168 p. , "Based on lectures delivered at the University of Virginia under the Page-Barbour Foundation on February 12, 13 [and] 14, 1952."

By Dobzhansky, Theodosius Grigorievich,.
New York Columbia University Press 1965 .
vi, 139 p. , On half t.p.: Page-Barbour lectures for 1954 at the University of Virginia.