Martin, William Ted. <br/><br/>
Elementary differential equations / 
by William Ted Martin and Eri c Reissner. 
 - 2nd ed. 
 - Massachusetts :  Addison-Wesley Publishing Co.,  [1961] 
 - xiii, 331 p. ;  24 cm. 
 - Addison-Wesley series in mathematics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.
<br/><br/><label>Dewey Class. No.: </label>515.3