Graham, R.L. <br/><br/>
Three-quantum annihilation of positrons in solids. 

 - Chalk River :  AECL,  1954. 
 - v. 32 p. 678-679 
<br/><br/><label>ISSN: </label>0067-0367 
<br/><br/><label>Standard No.: </label>AECL-132