Baum, John D. <br/><br/>
Elements of point set topology / 
John D. Baum 
 - Englewood Cliffs, N.J. :  Prentice-Hall,  1964 
 - x, 150 p. :  ill.;  24 cm. 
<br/><br/>Bibliography: p. 145-146 
<br/><br/><label>LCCN: </label>64-013253 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topology