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Flach, M., and D. L. Schuiling. (1988) 1988. “Revival of an Ancient Starch Crop: A Review of the Agronomy of the Sago Palm”. Agroforestry Systems 7 (3): 259-81. doi:10.1007/BF00046972.

Food and Agriculture Organization of the United Nations (FAO). (1974) 1974. “Experience With Individual Species”. In Tree Planting Practices in African Savannas, 42-44. Rome; New York: Food and Agriculture Organization of the United Nations [sold by Unipub]. http://www.worldcat.org/oclc/2931603.