TY - BOOK AU - Ymas, Sergio E. AU - Ferrer, Flordeliza F. ED - ED - ED - ED - SN - 2 PY - 0000///[Date of publication not identified]46 CY - [Place of publication not identified] :;[Place of publication not identified] PB - Ymas Publishing House,;Ymas Publishing House KW - KW - 2 KW - 0 KW - 6 KW - 20 KW - Statistics KW - sears0 N1 - 5 ER -