Stewart, A.T. <br/><br/>
Angular correlation of photons from positron annhilation in solids. 

 - Chalk River :  AECL,  1955. 
 - v. 99 (no. 2) p. 594-595 
<br/><br/><label>ISSN: </label>0067-0367 
<br/><br/><label>Standard No.: </label>AECL-246