Johnson , Donovan A. <br/><br/>
Exploring mathematics on your own  /    
Donovan A. Johnson and Willi am H. Glenn. 
 - New York  :   Dover Publications ,   1972. 
 - 303 p.  :    ill.  ;    22 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics --Popular works.------
<br/><br/><label>Dewey Class. No.: </label>510 EXP