Pearl, R <br/><br/>
SOME PHYSIOLOGICAL OBSERVATIONS REGARDING PLUMAGE PATTERNS.  [electronic resource] 

 -  Science (New York, N.Y.)  Jan 1914 
 - 143-4 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.39.995.143  doi