The culture of the Bontoc Igorot von Cawed, Carmencita

Beddeng exploring the Ilocano-Igorot confluence von Azurin, Arnold M.

A Sagada reader von Scott, William Henry 1921-1993

The rice cultivation and rice-harvest feast of the Bontoc Igorot von Birket-Smith, Kaj 1893-1977

Notices of the Pagan Igorots in the interior of the Island of Manila von Antolín, Francisco

Igorots geographic and ethnographic study of some districts of Northern Luzon von Perez, Angel

Igorots geographic and ethnographic study of some districts of Northern Luzon von Perez, Angel

Thirty years with the Philippine head-hunters von Kane, Samuel E.

Taming Philippine Headhunters A Study of Government and of cultural Change in northern Luzon by Felix M. Keesing and Marie Keesing. With an Introduction by Theodore Roosevelt von Keesing, Felix Maxwell 1902-1961

The Bontoc Igorot von Jenks, Albert E.

The Bontoc Igorot von Jenks, Albert Ernest 1869-

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Eine Weltreise Plaudereien aus einer zweijährigen Erdumsegelung von Meyer, Hans

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Sucinta Relacion de los progresos de Misiones de los Igorrotes y Tinguianes en la isla de Luzon, una de las llamadas Filipinas von Villacorta, Francisco