Northrop, Eugene Purdy <br/><br/>
Reddles in mathematics :  a book of paradoxes / 
Eugene Purdy Northrop 
 - London :  The english universities press,  1945 
 - x, 242 p. :  ill.. diagrs. ;  22 cm. 
<br/><br/> Includes bibl  Notes and refences : p. 229-234 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>152