Zamora, Elvira A Quantitative methods for business / Elvira A. Zamora. - Makati City : Helenica Books, Inc., 2001. - 194 pages ; 22 cm Includes indexes and biographical records. ISBN: 971-92401-1-3 Subjects--Topical Terms: Business--Research. Dewey Class. No.: Fil./B.Acctg. 001.42'650 Z25 2001