Betz, Herman, et al. <br/><br/>
Differential equations with applications 

 - 2 
 -  Harper & Row Publishers, New York  1964 
 - 354 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations; Analysis; Mathematics
<br/><br/><label>Dewey Class. No.: </label>515.35  BET-D2