Rainville, Earl David,  1907- <br/><br/>
Elementary differential equations / 
by Earl D. Rainville and Phillip E. Bedient 
 - 4th ed. 
 - New York :  MacMillan,  1969 
 - xiv, 466 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations