Ray, M. <br/><br/>
A Text Book of Differential Equations  
/ by M. Ray 
 - 9th Rev. ed. 
 - Agra:  Students' Friends & Co.,  1976. 
 - 406p.; 
<br/><br/><label>ISBN: </label>000 
<br/><br/><label>Dewey Class. No.: </label>515.35  / RAY/A