During may and june of 1972 Dr. Magraw of the national coal board visited sumatera to assessthe potential of the island's coal resources and visit some occurrences, in consequenco of this study by Dr. Magraw, was drawn up and implemented by Mr. fleming in August for the same year.
Ketersediaan
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Pusat Sumber Daya Mineral, Batubara dan Panas Bumi - Jln. Soekarno Hatta No. 444, Bandung, Jawa Barat
PMB LA 1973-3