Van Ginneken, J K <br/><br/>
Prolonged breastfeeding as a birth spacing method.  [electronic resource] 

 -  Studies in family planning  Jun 1974 
 - 201-6 p.  digital 
<br/><br/> Publication Type: Comparative Study; Journal Article 
<br/><br/><label>ISSN: </label>0039-3665 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Alaska<br/>Amenorrhea--etiology<br/>Breast Feeding<br/>Contraception<br/>Family Planning Services<br/>Female<br/>Fertility<br/>Humans<br/>India<br/>Intrauterine Devices<br/>Inuit<br/>Lactation<br/>Menstruation<br/>Ovulation<br/>Pregnancy<br/>Time Factors