University of the Philippines at Los Baños. Program on Environmental Science and Management. Information-Extension Center on Natural Resource Management. (1980). Directory on upland development and resource management. PESAM, University of the Philippines at Los Baños.

University of the Philippines at Los Baños. Program on Environmental Science and Management. Information-Extension Center on Natural Resource Management. Directory on Upland Development and Resource Management. Laguna: PESAM, University of the Philippines at Los Baños, 1980.

University of the Philippines at Los Baños. Program on Environmental Science and Management. Information-Extension Center on Natural Resource Management. Directory on Upland Development and Resource Management. PESAM, University of the Philippines at Los Baños, 1980.