| Reference | {Deposit:: METALS WEEK-METALS SOURCEBOOK, 10/28/74, ITEM #B4828}{Deposit:: METALS WEEK-METALS SOURCEBOOK, 11/19/73, ITEM #A5024}{Deposit:: BROWN, BRINTON C., 1972, THE MINERAL INDUSTRY OF THE PHILIPPINES: PREPRINTS FROM THE 1972 BUREAU OF MINES MINERALS YEARBOOK, P. 13} |