Northrop, Eugene P. <br/><br/>
Riddles in mathematics  a book of paradoxes 
Eugene P. Northrop. 
 - New York  D. Van Nostrand company, inc.  1944. 
 - viii, 262 p.  illus., diagrs. 
<br/><br/>"Notes and references": p. [245]-254. 
<br/><br/><label>LCCN: </label>44003524 //r86 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematical recreations.
<br/><br/><label>LC Class. No.: </label>QA95  / .N6 
<br/><br/><label>Dewey Class. No.: </label>510.76