Não informado. (1987). Nigerian Journal of Palms and Oil Seeds. Nigerian Institute for Oil Palm Research.
Citace podle Chicago (17th ed.)Não informado. Nigerian Journal of Palms and Oil Seeds. Benin City, Nigeria: Nigerian Institute for Oil Palm Research, 1987.
Citace podle MLA (8th ed.)Não informado. Nigerian Journal of Palms and Oil Seeds. Nigerian Institute for Oil Palm Research, 1987.
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