text/workbook Salamat, Lorina G. creator Sevilla, Merlyn R. text Metro Manila National Book Store, Inc. c1988 monographic xi, 202 p. : tabs and figs. ; 26 cm. Lorina G. Salamat, Merlyn R. Sevilla [and] Antonina C. Sta. Maria. Business mathematics Fil. 513.93 S159 1988 9710841890