Williamson Richard E <br/><br/>
Introduction to differential equations 
Williamson Richard E 
 - New Jersey   Prentice Hall          1986 
 - xiii,443p  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equations
<br/><br/><label>Dewey Class. No.: </label>B333, M6