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Item Restricted Export earning stability: a case for copper(1979-01) Cryde, Denise Joyce B.; Payumo, Emperatriz; Armas, Armando Jr.Item Restricted The copper industry: proposal for survival and stability(1982-10-07) Cruz, Lilybeth C.; Quaiachon, Dinah B.; Jurado, Gonzalo M.Item Restricted The history of mining in Benguet(1969-01) Paragas, Nicetas D.Item Restricted The role of the copper industry in the Philippine economic growth(1979-01) Gonzales, Sylvia L.; Santos, TeodoroItem Restricted The domestics resource cost analysis of copper smelting in the Philippines(1979-03-29) Portugal, Roque Francisco; Reyes, Daniel Delfin; Tecson, GwendolynItem Restricted Economic evaluation of the copper smelting and refining plant(1980-10) Esteban, Ma. Belen; Alonzo, Ruperto P.Item Restricted Cost-benefit analysis of copper smelter and refinary project(1981-03) Morada, Asuncion C.Item Restricted A feasibility study of the first copper smelter: the Philippine associated smelting and refining corporation(1982-01) Arceo, Nancy Socorro ReyesItem Restricted The cost of the Philippine copper industry measurement and applications(1980-03) Lapuz, Roque Jr. F.; Sison, Luis G.; Tan, edita A.Item Restricted The Philippine copper mining industry: a study on ore reserves and depletion(1974-01) Mortel, Fausto A.