College mathematics : text/workbook 
Sta. Maria, Antonina C. 
 - second edition. 
 -  National Book Store.  1998 
 - ix, 233 pages. 
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<br/><br/><label>ISBN: </label>9-71085942-0 
<br/><br/><label>Dewey Class. No.: </label>F 510 C68 1998