Lefschetz, Solomon <br/><br/>
Lectures on differential equations / 
by S. Lefschetz. 
 - Princeton, N.J. :  Princeton University Press,  1976. 
 - 209 p. :  fig. ;  23 cm. 
 - Annals of mathematics studies .
<br/><br/><label>ISBN: </label>0-691-08395-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations