There is a book ...
Indonesia
BALI / Indonesien, [pub as] H?hlenkundliches Reisetagebuch Band 1 1997 by Richard Bouchal 198 pp, 287 plates, 2 A3 maps. If these photos were in colour, then I would call this a `coffee table book?. An extremely detailed account of the caves and culture of this exotic country. SB In German ?20.00
CAVES OF THUNDER EXPEDITION REPORT / An Expedition to the World's Largest Underground River, Irian Jaya, Indonesia 1992 by Colin Boothroyd et al 1993 70 pp maps etc. A very detailed report covering both the political difficulties and how the technical problems were over come. SB ?4.50
EXPEDITION INDONESIE 90 1992 104 pp photos surveys. They explored 154 caves and surveyed 52 km of galleries. SB In French, summary in English. ?15.00
INDONESIA 1985-2001. EXPEDITIONS OF THE ASSOCIATION PYR?N?ENNE DE SP?L?OLOGIE by Fran?ois Brouquisse; Louis Deharveng & Michael Laumanns (editors): Berliner H?hlenkundliche Berichte, Volume 59 208 pp.; Berlin 2015. Fourteen expeditions to Indonesia are presented in this volume. The expeditions mainly targeted Sulawesi and Sumatra, but also Halmahera (Moluccas), West Papua (formerly Irian Yaya), and the small island of Muna. Describes 338 caves and karst sites with a total of over 109 km of mapped caves passages, including Gua Salukkan Kallang, the currently 2nd longest cave of Indonesia (12,263 m). Has detailed location maps, a synoptic list of caves/karst sites explored, and a bibliography on karst and caves of Indonesia. SB ?15.00
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MAROS 88 - 89 Expedition de l'Association Pyreneenne de Speleo a Sulawesi, Indonesia. 1990 51 pp photos, 3 in colour surveys etc. Caves up to 12 km long anf 200 m deep are described. SB In French ?9.00
SULAWESI 94 Report of the Bristol Exploration Club Caving Expedition to Sulawesi, indonesia. Oct 1996. 64pp A4 over 50 caves were visited and describes, some with surveys. Also includes a section on logistics. SB ?5.00
SUMATRA 87 by Des Marshall et al 66 pp 10 figs It is amazing what turns up after 18 years, another publication, unknown, even to TO. Needless to say, essential reading for anyone going to Sumatra. SB ?5.00
THE CAVES OF GUNUNG BUDA 1997 Bradley Hacker Ed. 1998 65 pp plus plates. This expedition added over 12 km of new and surveyed cave passage. Scoops included the connecting of Green Cathedral Cave to Upper Turtle Cave - a 20 km system. SB ?15.00
Sorry, they are all sold. Might be a useful reference somewhere.