College algebra : text / workbook 
Salamat, Lorina G. 
 - revised edition. 
 -  National Book Store, Inc.  1995 
 - vi, 244 pages. 
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<br/><br/><label>ISBN: </label>9-71085892-0 
<br/><br/><label>Dewey Class. No.: </label>F 512 Sa3c 1995