Duggal, B. D. Chhabra, C. L. <br/><br/>
Fundamentals of Modern Physics 

 - Jullundur  Vishal Publications  1981 
 - p.448 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physics<br/>Natural Radio Activity
<br/><br/><label>Dewey Class. No.: </label>539 D866F