The world book of math power/ 
World Book Encyclopedia, inc. 
 - Chicago :  World Book Encyclopedia,  c1983. 
 - 480 p. :  ill., figs., tabs. ;  23 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: v. 2, p. 764-766. 
<br/><br/>
<br/><br/><label>ISBN: </label>978-0716631606 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics<br/>Skills<br/>Maths.
<br/><br/><label>LC Class. No.: </label>QA39.2  / .W67 1983