THE GEOLOGY AND MINERAL RESOURCES OF LAO PDR
resources map published in 1991 is prepared by British Geological Survey and British Mineral Consultants Ltd., all known mineral occurrences are added on the map. Main source of information for this map is as follows: Geological map at 1:500,000 over whole Indochina prepared by Service Geologique de l'Indochine, based in Hanoi, Vietnam, in 1930. Geological map of Xam Neua(northeast .
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