Philippine Islands. Dept. of Agriculture and Natural Resources. (1976). Agricultural development in southeastern Asia and Malaysia by Hon. Rafael R. Alunan, secretary of agriculture and natural resources: A report on his observations while cruising with the governor-general of the Philippine islands, on the U.S.S. Pittsburgh, from Feb. 28-to April 14, 1931 [microform]. Photoduplication Service, University of the Phil ppines Library.

Philippine Islands. Dept. of Agriculture and Natural Resources. Agricultural Development in Southeastern Asia and Malaysia by Hon. Rafael R. Alunan, Secretary of Agriculture and Natural Resources: A Report on His Observations While Cruising with the Governor-general of the Philippine Islands, on the U.S.S. Pittsburgh, from Feb. 28-to April 14, 1931 [microform]. Quezon City: Photoduplication Service, University of the Phil ppines Library, 1976.

Philippine Islands. Dept. of Agriculture and Natural Resources. Agricultural Development in Southeastern Asia and Malaysia by Hon. Rafael R. Alunan, Secretary of Agriculture and Natural Resources: A Report on His Observations While Cruising with the Governor-general of the Philippine Islands, on the U.S.S. Pittsburgh, from Feb. 28-to April 14, 1931 [microform]. Photoduplication Service, University of the Phil ppines Library, 1976.