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Raynor, W. C., and J. H.  Fownes. 1991. ?Indigenous Agroforestry Of Pohnpei: 2. Spatial And Successional Vegetation Patterns?. Agroforestry Systems 16 (2): 159-165. doi:10.1007/BF00129746. https://doi.org/10.1007/BF00129746.