Westoff, Charles F. The third child : a study in the prediction of fertility / Charles F.Westoff, Robert O.Potter & Philip C. Sagi - Princeton : University Press ; 1963 - xxiii, 295p.: ill.; 24 cm. Includes bibliographical references and index. Subjects--Topical Terms: United StatesFertilityChildren Dewey Class. No.: 312.1 / WES