Naciancieno, Natividad T. creator Lugos, Modesta G. Garcia, Ligaya B. text Manila National Book Store, Inc. c1981 monographic 199 p. : tabs and figs. ; 22 cm. Natividad T. Naciancieno, Modesta G. Lugos [and] Ligaya P. Garcia. Statistical mathematics Fil. 519.5 N124 1981 9710800647