Negritos of Zambales

Ethnological results of the Point Barrow expedition Ninth Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1887-1888, Government Printing Office, Washington, 1892, pages 3-442

The Negro_ What is His Ethnological Status? 2nd Ed.

Memoir of William Watts McNair, Late of "Connaught house," Mussooree, of the Indian Survey Department, the First European Explorer of Kafiristan