G.K. Publishers. <br/><br/>
Gate Papers Physics 
G.K. Publishers 
 - Noida :  G.K. Publishers,  c2011. 
 -  ill.; 
<br/><br/><label>ISBN: </label>8183550398 
<br/><br/><label>Dewey Class. No.: </label>530.76  / GKP/GAT