Terbijhe, A. (Agr. Economy), 1997
Styles of farming of upland farmers: a case study in Dipugpug, Sierra Madre.

Rijt, G. van (Biology), 1997
The role of grassland development: the effects of woody tree patches in grassland areas.

Baldi, M. (Cultural Anthropology), 1997
Are the Agta of N.E. Luzon victims of progress?

Mennega, J. (Public Adminstration), 1997
Implementation of the Bugkalot CADC and the various issues related to this.

Mingelers, K. (Cultural Anthropology), 1997
Motivation, expectation and perception of rural migrants to the Sierra Madre uplands.

Dam, J. van (Environmental Science), 1997
The role of land quality behind the process of migration to the Sierra Madre. An interdisciplinary study to find out the biophysical, economic and social motives for farmers to leave their source area and to enter the uplands of the Sierra Madre.

Zondag., R. (social Geography), 1997
Investment in sustainable agriculture in the Sierra Madre, the Philippines. An explorative research on the motivations of farmers to invest in sustainable agriculture.

Brauchler, B. (Cultural Anthropology), 1997
The Agta: transition from hunting and gathering to agriculture.

Schaefer, J. (Cultural Anthropology), 1997
The Agta: transition from hunting and gathering to agriculture.