Pennisi, Louis L. <br/><br/>
Elements of ordinary differential equations   
by Louis L.Pennisi 
 - New York  Holt, Rinehart and Winston  1972 
 - xiii, 767p. 
<br/><br/><label>ISBN: </label>0030789508 
<br/><br/><label>LCCN: </label>72-174155 
<br/><br/><label>Dewey Class. No.: </label>515.352  / N721