Kasriel, Robert Herman <br/><br/>
Undergraduate topology 
Robert H. Kasriel 
 - Hungtington, New York  Robert E. Krieger Publishing Company  1971 
 - xiv, 285 p. : ill. ; 26 cm. 
<br/><br/>p. 277-278. 
<br/><br/><label>ISBN: </label>0882754440 
<br/><br/><label>LCCN: </label>76-18783 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Topology