Khanna, M. L. <br/><br/>
Differential equations / 
by M. L. Khanna. 
 - 6th ed. 
 - Meerut :  Jai prakash nath,  1969 
 - xx, 460p. ;  19x13cm. 
<br/><br/> It has list of important formula at the introduction. 
<br/><br/><label>ISBN: </label> : Rs.8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>DIFFERENTIAL EQUATIONS
<br/><br/><label>Dewey Class. No.: </label>515.35  / KHA-DIF