Ball, M J <br/><br/>
The "morning after pill".  [electronic resource] 

 -  Canadian Medical Association journal  Oct 1971 
 - 691 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0008-4409 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contraceptives, Oral<br/>Contraceptives, Postcoital<br/>Female<br/>Humans<br/>Pregnancy