Calambayanga Island, Jose Panganiban (Mambulao), Camarines Norte Province, Bicol Region, Luzon, Philippines
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4 entries listed. 4 valid minerals.
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- Pratt, W. E. (1915): Iron ore on Calambayanga Island, Mambulao, Carmarines. Philippine J. Sci. 10A, 323-331.