Commonwealth Act No. 136 : an act creating the Bureau of Mines ; Commonweatlh Act No. 137 : the mining act, as amended ; Act No. 2719 : the coal land act, as amended ; Republic Act No. 4274 : mining engineering law of the Philippines ; Republic Act No. 4209 : geology profession law of the Philippines
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書誌事項
Commonwealth Act No. 136 : an act creating the Bureau of Mines ; Commonweatlh Act No. 137 : the mining act, as amended ; Act No. 2719 : the coal land act, as amended ; Republic Act No. 4274 : mining engineering law of the Philippines ; Republic Act No. 4209 : geology profession law of the Philippines
Bureau of Mines, 1967
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