Ricardo, Henry. <br/><br/>
A Modern introduction to differential equations / 
Henry Ricardo. 
 - 1st  ed. 
 - Boston :  Houghton Mifflin,  2003. 
 - xiv, 445  p. 
<br/><br/><label>ISBN: </label>0618042393 : 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.