Tagudin

MINING MAGAZINE, PHILIPPINES IRON: APRIL 1976, P. 311.MINING JOURNAL, PHILIPPINES IRON ORE CONCENTRATE: JANUARY 8,1965, P. 27.WORLD MINES REGISTER 76/77, FILMAG (PHILIPPINES) INC.:VOL. 31, MILLER FREEMAN PUBLICATIONS, SAN FRANCISCO, 1976,P. 133.WORLD MINING, PHILIPPINES: VOL. 9, NO. 7, CATALOG, SURVEYAND DIRECTORY NUMBER, JUNE 25, 1973, P. 156.MINING MAGAZINE, TABLE B-1040 MINES ACCOUNTING FOR 90% OFALL OUTPUT OTHER THAN COAL: VOL. 125, NO. 3, SEPTEMBER1971, P. 263.PHILIPPINE BUREAU OF MINES, MINERAL NEWS SERVICE: NO. 70,1975, P. 6, 13, 20.UNECAFE, MINERAL DEVELOPMENT IN ASIA AND THE FAR EAST,MINERAL RESOURCES DEVELOPMENT SERIES, NO. 33, NEW YORK,1968, P. 115.STAFF, 1978 ENGINEERING AND MINING JOURNAL INTERNA-TIONAL DIRECTORY OF MINING AND MINERAL PROCESSING OPER-ATIONS, NEW YORK, MCGRAW-HILL, 1978, 331P.ENGINEERING AND MINING JOURNAL (E/MJ) INTERNATIONAL DIRECT-ORY OF MINING AND MINERAL PROCESSING OPERATIONS, FILMAG(PHILIPPINES) INC.: 1978, P. 331.PHILIPPINE BUREAU OF MINES, DATA ON PHILIPPINE MINERAL RE-SOURCES: INFORMATION CIRCULAR NO. 22, MANILA, JANUARY,1975, P. 8-9, 22.