OBERAY, S.C. <br/><br/>
SUCHNA SAMPRESHAN AUR SHAIKSHIK TAKNIKI 

 - NEW DELHI   ARYA BOOK DEPOT 
 - 538p. 
<br/><br/> 1662 
<br/><br/><label>ISBN: </label> 325 
<br/><br/><label>Dewey Class. No.: </label>371 OBE S