Ray, M., Chaturvedi, J.C. and Sharma, Har Swarup <br/><br/>
A Text Book of Differential Equations 

 - 5 
 - Agra  Student's Friends & Co.  1958 
 - 389 
<br/><br/><label>Publisher. No.: </label> Sridhar Book Shop 
<br/><br/><label>Subjects--Personal Names: </label> Mathematics 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics