Feldman, D B <br/><br/>
Methods for obtaining neonates of known age from the Virginia opossum (Didelphis marsupialis virginiana).  [electronic resource] 

 -  Laboratory animal science  Aug 1975 
 - 437-9 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0023-6764 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Age Factors<br/>Animals<br/>Animals, Newborn<br/>Estrus<br/>Female<br/>Fertilization<br/>Labor, Obstetric<br/>Lactation<br/>Litter Size<br/>Male<br/>Opossums--physiology<br/>Pregnancy<br/>Spermatozoa--cytology<br/>Vaginal Smears