Martin, William Ted. <br/><br/>
Elementary differential equations, 
by William Ted Martin and Eric Reissner. 
 - 2d ed. 
 - Massachusetts :  Reading.Addison-Wesley Pub. Co.  [1961] 
 - 331 p. :  ill. ;  24 cm. 
 - Addison-Wesley series in mathematics .
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.