Scott, Foresman mathemaics 
Bolster, L. Carey. 
 -  Scott, Foresman and Company.  1980 
 - viii, 439 pages. 
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<br/><br/><label>ISBN: </label>0-673-11817-7 
<br/><br/><label>Dewey Class. No.: </label>510 Sc3 1980