Modern college algebra 
Vance, Elbridge P. 
 - third edition. 
 -  Addison-Wesley Publishing Company, Inc.  1975 
 - 310 pages. 
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<br/><br/><label>ISBN: </label>9-71081696-9 
<br/><br/><label>Dewey Class. No.: </label>512 V2771 1975