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Supporting reports on microfiche in pocket, vol.2.
Volume 1 contains the executive summary, vol.2 the main report.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Development of the water resources of Bali : a master plan. ISBN 0902409999. Published by Land Resources Development Centre in 1980. Publication and catalogue information, links to buy online and reader comments.