Abbot, C G <br/><br/>
SMITHSONIAN ENTERPRISES.  [electronic resource] 

 -  Science (New York, N.Y.)  Nov 1942 
 - 417-9 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.96.2497.417  doi