Wirkus, Stephen A. ... [et al.]  <br/><br/>
Course in differential equations with boundary-value problems  
Wirkus, Stephen A. ... [et al.]  
 - 2nd ed.  
 -   CRC Press  2017 
<br/><br/><label>Dewey Class. No.: </label>515.352  / T17 WIR.S