Pontryagin, L.S. <br/><br/>
Foundations of combinatorial topology / 
by L.S. Pontryagin. 
 - 5th print 
 - Rochester, NY :  Graylock Press,  1965. 
 - 99 p. ;  23 cm. 
<br/><br/>Index pp. 97-99 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topology