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.
Citace podle Chicago (17th ed.)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.
Citace podle MLA (9th ed.)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.