Ayres,Frank Jr <br/><br/>
Theory and problem of differential equations 

 - 1st . Ed. 
 - New York  Tata McGraw Hill Education Limited  1981 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>621  / AY-T