Paglikha at paglalarawan sa pagkakakilanlang Tinguian, (1823-1904) - Rovillos, Raymundo D. (2005)
Thesis (Doctor of Philosophy) -- University of the Philippines, April 2005.
Includes bibliographical references (leaves 275-287).
Keywords: Tinguian (Philippine people).; Tinguian (Philippine people) -- History; Abra -- History