Betz, Herman <br/><br/>
Differrential equations with applications. 
by Herman Betz, Paul B Burcham & Gerge M Ewing 
 - 2nd ed. 
 - New York:  Harper & Row Publishers,  1964. 
 - x,354p.:  22cm. 
<br/><br/>Index. 
<br/><br/><label>Subjects--Index Terms: </label>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>510.3