The essentials of differential equations I / 
 Differential equations 1 
staff of research & Education Association 
 - Piscataway, NJ :  Research & Education Association,  c1998 
<br/><br/> Library has vol. I 
<br/><br/><label>ISBN: </label>0878915818 9780878915811 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations