Paper on porphyry copper and gold deposits of the Tombulilato District, North Sulawesi Province, Indonesia: Presented at The Asian Mining 1985 Conference
Riwayat KP Eksplorasi DU 353/Sulut Daerah Motomboto - Tombulilato Kec. Suwawa dan Bone Pantai Kabupaten Gorontalo Propinsi Sulawesi Utara
27th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12 February - 11 May 1995
26th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12 November 1994 - 11 February 1995
25th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12th August - 11th November 1994
24th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12th May - 11th August 1994
23th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12th February - 11th May 1994
22th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12th November 1993 - 11th February 1994
21th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12 August 1993 - 11 November 1993
20th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara 12 May 1993 - 11 August 1993
19th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara: 12February 1993 - 11 May 1993
18th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara: 12 November 1992 - 11 February 1993
32th and 33th Quarterly Report On Gold-Copper Exploration DU 353 and DU 356 Motomboto/Tombulilato - Taludaa, Sulawesi Utara: May - November 1996
28th quarterly report on gold exploration DUs 356 (Taludaa) and 357 (Tapadaa) - EX DU 319 Sulawesi Utara 05 August - 04 November 1995
34th and 35th Quarterly Report On Gold-Copper Exploration DU 353 and DU 356 Motomboto/Tombulilato - Taludaa, North Sulawesi (The areas are now under one CoW application): November 1996 - April 1997
30th and 31th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara: 12 November 1995 - 11 May 1996
29th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara: 12 August - 11 November 1995
28th Quarterly Report On Gold-Copper Exploration DU 353 (Ex DU 317) Motomboto-Tombulilato, Sulawesi Utara: 12 May - 11 August 1995
P.T. Tropic Endeavour Indonesia feasibility studies report September 1986