Kern, M D <br/><br/>
Seasonal changes in the reproductive system of the female white-crowned sparrow, Zonotrichia leucophrys gambelii, in captivity and in the field. 2. The incubation patch.  [electronic resource] 

 -  Cell and tissue research  Nov 1979 
 - 379-98 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S. 
<br/><br/><label>ISSN: </label>0302-766X 
<br/><br/><label>Standard No.: </label>10.1007/BF00220432  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Birds--anatomy & histology<br/>Epidermis--anatomy & histology<br/>Estradiol--pharmacology<br/>Female<br/>Lipids--analysis<br/>Progesterone--pharmacology<br/>Reproduction<br/>Seasons<br/>Skin--analysis<br/>Testosterone--pharmacology<br/>Water--analysis