Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 17th quarterly report 12 August - 11 November 1992
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 11th quarterly report 12 February - 11 May 1991
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 9th quarterly report 12 August - 11 November 1990
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 8th quarterly report 12 May - 11 August 1990
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 7th quarterly report 12 February - 11 May 1990
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 6th quarterly report 12 November - 11 February 1990
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 4th quarterly report 12 May - 11 August 1989
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 2nd quarterly report 12 November 1988 - 11 February 1989
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 1st quarterly report 12 August - 11 November 1988
Riwayat KP Eksplorasi DU 353/Sulut Daerah Motomboto - Tombulilato Kec. Suwawa dan Bone Pantai Kabupaten Gorontalo Propinsi Sulawesi Utara
Rencana kegiatan eksplorasi di wilayah KP DU-353/Sulawesi Utara
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 16th quarterly report 12 May - 11 August 1992
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 15th quarterly report 12 February - 11 May 1992
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 13th quarterly report 12 August - 11 November 1991
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 12th quarterly report 12 May - 11 August 1991
Quarterly report on gold exploration DU 353 (EX DU 317) Motomboto, Sulawesi Utara 10th quarterly report 12 November 1990 - 11 February 1991
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 5th quarterly report 12 August - 11 November 1989
Quarterly report on gold exploration DU 317 Motomboto, Sulawesi Utara 3rd quarterly report 12 February - 11 May 1989
27th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12 February - 11 May 1995