A preliminary reconnoissance of the Mancayan-Suyoc mineral region, Lepanto, P. I ανά Eveland, Arthur John

Complete list of Spanish mining claims recorded in the Mining Bureau ανά Burritt, Charles H.

Philippines regional natural resources atlas.

The Mining Record.

Bulletin.

Memoria geologico-minera de las Islas Filipinas ανά Centeno y Garcia, Jose

A manual of elementary geology ανά Lyell, Sir Charles

The International Journal of Mineral Resources Engineering.

The International Journal of Mineral Resources Engineering.

Natural Resources Research [ejournal].

Available for University of the Philippines Diliman via Springerlink. Click here to access