Ayres, Frank  <br/><br/>
Theory and problems of differential equations 
Frank Ayres 
 - New York  Schaum Publishing Company  1952 
 - 296p. 
 - Schaum's Outline Series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential Equations
<br/><br/><label>Universal Decimal Class. No.: </label>517.2  / AYR