Martin, William Ted,  1911- <br/><br/>
Elementary differential equations / 
by William Ted Martin and Eric Reissner 
 - 2nd ed. 
 - Reading, Mass. :  Addison-Wesley,  1961 
 - 331 p. :  ill. ;  24 cm. 
 - Addison-Wesley series in mathematics .
 - Addison-Wesley series in mathematics .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations