Lefschetz, Solomon,  1884-1972. <br/><br/>
Differential equations:  geometric theory/ 
Solomon Lefschetz. 
 - 2d ed. 
 - New York:  Dover,  1977. 
 - x, 390 p.:  ill.;  21 cm. 
<br/><br/> "Unabridged republication of the second (1963) edition of the work originally published by Interscience Publishers in 1957 as volume VI of the Interscience pure and applied mathematics series."  Includes index. 
<br/><br/>Bibliography: p. 376-385. 
<br/><br/><label>ISBN: </label>0486634639 : 
<br/><br/><label>LCCN: </label>76053978 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.<br/>Topology.
<br/><br/><label>Dewey Class. No.: </label>515.35