Sánchez, David A <br/><br/>
Differential equations an introduction 
David A Sanchez 
 - 2nd ed 
 - London  Addison-Wesley Pub. Co;  c1983. 
 - 516 p. : 
<br/><br/><label>ISBN: </label>0201077604 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations--General
<br/><br/><label>Dewey Class. No.: </label>515.35 SAN