TY - BOOK AU - Dayrit, Benjamin C. AU - Ymas, Sergio E. ED - ED - ED - ED - SN - 2 PY - 2000///46 CY - Manila:;Manila PB - Ymas Publishing House,;Ymas Publishing House KW - KW - 2 KW - 0 KW - 6 KW - 20 N1 - 5 ER -