Esser, Martinus <br/><br/>
Differential equations / 
Martinus Esser 
 - Philadelphia :  W. B. Saunders  1968 
 - ix, 249 p. :  ill. ;  24 cm. 
 - Saunders mathematics books .
<br/><br/><label>LCCN: </label>67-14820 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations