Grewal, B.S. <br/><br/>
Higher engineering mathematics 

 - Eleventh  
 - Khanna publishers   Delhi  1983 
 - 939  fig. 
<br/><br/><label>Nat. Bib. No.: </label>7124 
<br/><br/><label>Universal Decimal Class. No.: </label>511.6  / GRE