Schaum`s outlines differential equations/ 
Bronson,Richard 
 - 3rd.ed. 
 - New York:  Mcmillan hill,  2006. 
 - 385 
<br/><br/><label>ISBN: </label>9780071611626 
<br/><br/><label>Dewey Class. No.: </label>515.35  / BRO/S