Report on Mapping and Sampling Hutabargot Julu, Panyabungan, Natal COW 9759 19-2-1986 to 11-3-1986
Proposed work programme and budget for the year ending 31st March, 1989: PT. Antam Barisan Mining
Quarterly progress report for the period ending September 30, 1988: Prospect 9756
Presentation to Aneka Tambang 13 November 1986
Blok prospek pada eks wilayah kontrak karya Antam Barisan Mining, Sumbar-Sumut (KP. DU-219, 220, 223, 224, 235, 236, 237, 238, 239/SUMBAR dan KP. DU-235/SUMUT)
Quarterly progress report for the period ending 31 st March 1990
Quarterly progress report for the period ending September 30, 1987: Prospect 9756
Quarterly progress report for the period ending June 30, 1988: Prospect 9756
Fourth quarterly report and 1987 annual review PT Antam Barisan Mining
Annual progress report for the year ending 31st December 1988
Prospect 9759 Report on drainage geochemistry and geological follow-up investigation at Rao, Hutabargot Julu and Muara Soma areas, Natal, Sumatera, Indonesia: CSR Limited Minerals exploration and development group
Resume kegiatan EKS wilayah kontrak karya Antam Barisan Mining Sumut - Sumbar