Kelly, William J. <br/><br/>
A cost-effectiveness study of clinical methods of birth control :  with special refernce to Puerto Rico / 
William J. Kelly 
 - New York :  Prager ,  1971 
 - xii, 121p.:  ills.;  23 cm. 
 - Praeger special studies in international economics and devleopment .
<br/><br/>Includes  index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Family planning
<br/><br/><label>Dewey Class. No.: </label>312.02  / PR KEL