Region I

Sonraí bibleagrafaíochta
Údar corparáideach:	Philippines. National Mapping and Resource Information Authority
Formáid:	LÉARSCÁIL
Teanga:	English
Foilsithe / Cruthaithe:	Makati City National Mapping and Resource Information Authority 1990.
Eagrán:	Ed.1, November, 1989.
Ábhair:	Ilocos Region > Maps.