Ayres Frank <br/><br/>
Theory and problems of differential equations 
Ayres Frank 
 - New York  Schaum Publishing          1952 
 - 296p  cm. 
 - Schaum's Outline Series .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Equations
<br/><br/><label>Dewey Class. No.: </label>B33, J2