Parrilla Bonilla, Antulio, <br/><br/>
Neomaltusianismo en Puerto Rico. 

 - Río Piedras, P. R.  Editorial Juan XXIII  1974. 
 - 180 [2] p.  ill., photos. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Malthusianism--Addresses, essays, lectures.<br/>Birth control
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Puerto Rico--Population.