Westoff, Charles F. <br/><br/>
The third child :  a study in the prediction of fertility / 
by Charles F. Westoff, Robert G. Potter and Philip C. Sagi. 
 - Princeton, N.J. :  Princeton Univ. Press,  1963. 
 - xxiii, 293 p. :  ill. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertility, Human.<br/>Family size.
<br/><br/><label>Dewey Class. No.: </label>612.6  / WET 1963