Boyd, H M <br/><br/>
Sigma Delta Epsilon (X5).  [electronic resource] 

 -  Science (New York, N.Y.)  Feb 1965 
 - 956-7 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0036-8075 
<br/><br/><label>Standard No.: </label>10.1126/science.147.3660.956  doi