Cullen, Helen F.  1919- <br/><br/>
Introduction to general topology/ 
Helen F. Cullen. 
 - Boston:  Heath,  [1967, c1968]. 
 - x, 427 p.:  illus.,  24 cm. 
<br/><br/>Bibliography: p. [417]-420. 
<br/><br/><label>LCCN: </label>67016908 //r84 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topology.
<br/><br/><label>Dewey Class. No.: </label>514  / C967i