Kuczynski Robert, R <br/><br/>
Balance of births and deaths / 
by Robert R Kuczynski 
 - Washington :  Brooking Insiistution,  1931. 
 - 238p. : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Births
<br/><br/><label>Dewey Class. No.: </label>304.62  / KUC/B