Nagle, R. Kent. <br/><br/>
Fundamentals of differential equations / 
R. Kent Nagle, Edward B. Saff. 
 - 3rd ed. 
 - Reading, Mass. :  Addison-Wesley,  c1993. 
 - xxi, 608 p. :  ill. (some col.). 
<br/><br/><label>ISBN: </label>080535056X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.