Social Science Research and Conservation Management in the Interior of Borneoand downloaded the large PDF from http://www.cifor.cgiar.org/docs/_ref/publications/index.htm (the whole thing is 9 MB... and 312 pages). It's mostly Indonesian in locale, but for Kayan/Kenyah that's a good corrective to the Sarawak-centric view
Unravelling past and present interactions of people and forests
Cristina Eghenter, Bernard Sellato and G. Simon Devung
date: June 2003
See CIFOR home page for more...
Malaysia map and placename index ...viz Batang Balui
Kapit District FAQ
Sarawak and Sabah coordinates for hundreds of named units, in decimal degrees ...I've got the Access db in my Docs folder.
Sometimes it's necessary to learn about something entirely new in order to comprehend the lives of people. Rice cultivation is such a 'new' thing... if one wants to grasp the lives of Dayak peoples, rice is clearly one of the essentials...