Kelly, William J <br/><br/>
A Cost -effectiveness study of clinical methods of birth control  with special reference to Puerto Rico 

 - New York  Praeger publishers  1971 
 - xii, 121p.; 23cm. 
 - Praeger special studies in International economics and development .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birth control clinics<br/>Contraceptive services<br/>Family planning<br/>Sterilization