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Zentmyer G.A., . (1990) Origin distribution and significance of species of Phytophthora in the tropics. [Proceedings Paper]
Lee B.S., . and Khoo B.L., . and Zentmyer G.A., . (1986) Relationship between calcium levels and cocoa stem canker caused by morphological forms of Phytophthora palmivora. [Proceedings Paper]