Kells, Lyman M.  1888- <br/><br/>
Elementary differential equations. 

 - 3d ed. 
 - New York,  McGraw-Hill Book Co.,  1947. 
 - xiv, 312 p.  diagrs.  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>LC Class. No.: </label>QA371  / .K4 1947