Reconnaissance soil survey of Perlis - Paramananthan, S.; Soo, Swee Weng; Malaysia. Jabatan Pertanian. Bahagian Sains Tanah. Cawangan Penyelidikan (Kuala Lumpur : Soil Science Division, Division of Agriculture, Ministry of Agriculture and Fisheries, 1968)
Keywords: Soil surveys -- Perlis; Soil -- Perlis