Geology and mineral resources of Abra Province
By: by Map and Mineral Resources Compilation Project.
Series: Report of investigation -- Republic of the Philippines, Bureau of Mines ;; no. 85; Report of investigation (Philippines. Bureau of Mines) ;; no. 85.
Publisher: Bureau of Mines
Published: 1976
Place of publication: Manila
Language: eng
Number of pages: 14
Subjects: Mines and mineral resources -- Philippines -- Abra.; Geology -- Philippines -- Abra.