Keller, S <br/><br/>
Progestin-only methods are very effective.  [electronic resource] 

 -  Network (Research Triangle Park, N.C.)  Jun 1995 
 - 4-8 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0270-3637 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contraception<br/>Contraceptive Agents<br/>Contraceptive Agents, Female<br/>Family Planning Services