Igorots geographic and ethnographic study of some districts of Northern Luzon - Perez, Angel; Fox, Enriqueta (Baguio City Cordillera Studies Center, University of the Philippines, 1988)
Originally published as : Igorrotes : estudio geografico y etnografico sobre algunos distritos del Norte de Luzon, 1902.
Keywords: Ethnology -- Philippines -- Northern Luzon; Northern Luzon -- Description and travel