Differential equations with boundary-value problems 
Dennis G. Zill, Michael R. Cullen. 
 - 3rd ed. 
 - Islamabad :  National Book Foundation. 
 - xv, 775p. :  ill. ;  29 cm. 
<br/><br/> Includes Index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1.Differential equations--Textbooks. 2.Boundary value problems--Textbooks.
<br/><br/><label>Dewey Class. No.: </label>515.35