Informe sobre las minas de cobre de las rancheries de Mancayan, Suyuk, Bumucun y Agbao en el distrito de Lepanto, isla de Luzon de Luzon de las Filipinas [microform]. - Santos, Jose Maria (Quezon City Photoduplication Service. University of the Philippines Library, 1976)
Microfilmed with 19 other titles.
Originally published by Impr. de Ramirez y Giraudier, Manila, 1861.
Keywords: Copper mines and mining -- Mountain Province -- Lepanto