Esser, Martinus. <br/><br/>
Differential equations   

 - London :   W B Saunders,   1968. 
 - VIII, 312 ;  
<br/><br/><label>ISBN: </label>0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical Sciences
<br/><br/><label>Dewey Class. No.: </label>515.35  / ESS