Differential equations / 
Ross,Shepley L., 
 - Waltham,massachusetts :  Blaisdell,  c1964 
 - vii,594p. ;  ill.;  25cm. 
<br/><br/><label>Subjects--Topical Terms: </label>--mathematics
<br/><br/><label>Dewey Class. No.: </label>515.35 ROS