Mr. Surjono ( DMR ) and Dr. M. Schwartz travelled to Belitung, Bangka and Sumatera ( Tigapuluh, Riau Province) from May 16 until June 26, 1984. They carried out the field work for the first phase of the project " Tin - bearing Granites " which consisted or the investigation of primary tin deposits on the tin islands and assistance to the present exp…
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Deskripsi Fisik
9 halaman , tidak berwarna , tidak bergambar , cov