Beta and gamma radioactivity. 

 - [s.l.] :  [s.n.],  [1952?]. 
 - p. 990-1320 
<br/><br/> Proceeding 
<br/><br/><label>Subjects--Topical Terms: </label><br/>RADIACTIVIDAD
<br/><br/><label>Universal Decimal Class. No.: </label>539.16