| Reference | {Deposit:: BUREAU OF MINES, MANILA, INFORMATION CIRCULAR NO.22. DATA ON PHILIPP. MINERAL RECOURCES, JAN. 1975.}{Deposit:: WALTHER H.J., 1976, BGR INTERNER BERICHT}{Deposit:: BGR, JAN. 1978, ROHSTOFFWIRTSCHAFTLICHE LAENDERBERICHTE, PHILIPPINEN}{Deposit:: PHILIPPINE BUREAU OF MINES AND GEO-SCIENCES, 1986, GEOLOGY AND MINERAL RESOURCES OF THE PHILIPPINES, VOLUME 2: MINERAL RESOURCES: MANILA, PHILIPPINES, PHILIPPINE BUREAU OF MINES AND MINERAL RESOURCES, 446 P.} |