Davis, B M <br/><br/>
SPECIES, PURE AND IMPURE.  [electronic resource] 

 -  Science (New York, N.Y.)  Feb 1922 
 - 107-14 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.55.1414.107  doi