Leighton, Walter <br/><br/>
Elementary differential equations / 
Walter Leighton 
 - 2nd ed. 
 - Belmont, Ca. :  Wadsworth Publishing Co.,  1966 
 - 246 p. :  ill. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations