| Reference | {Deposit:: MATERIALS SURVEY, MANGANESE, MATERIALS OFFICE, NATIONAL SECU}{Deposit:: SOURCES BOARD, U.S. DEPT. OF THE INTERIOR, BUREAU OF MINES,}{Deposit:: 52, PG. X-20.}{Deposit:: SOREM,R.K., GEOL. OF THREE MAJOR MANGANESE DISTS. OF THE PHI}{Deposit:: PP.661-666, EIGHTH PAC.SCI. CONG. OF THE PAC. SCI. ASSOC. PR}{Deposit:: QUEZON CITY, U. OF PHIL. 1956 V. 2-A.}{Deposit:: CRU3,D.P.,1947,MANGANESE OF BUSUANGA ISLAND:PHIL.GEOLOGIST,1}{Deposit:: MCCARROLL,S.J.,1950;PHIL.MN.RES. LTD.,E.M.J,151,88-89}{Deposit:: KEELER,R,1938;PHIL.NEW SOURCE OF MANG.;E.M.J,139,29-32}{Deposit:: PHIL.BUR.MINES,1955,INFO.CIRC.19,MANGANESE, 66-87} |