Derrick, William R. <br/><br/>
Elementary differential equations with applications   
by William R.Derrick, Stanley I.Grossman 
 - Massachusetts  Addison Wesley  1976 
 - x, 537p. 
 - Addison-Wesley Series in Mathematics .
<br/><br/><label>LCCN: </label>75-12094 
<br/><br/><label>Dewey Class. No.: </label>515.3502453  / N761