Não informado. (1987). Nigerian Journal of Palms and Oil Seeds. Nigerian Institute for Oil Palm Research.
Chicago-viite (17. p.)Não informado. Nigerian Journal of Palms and Oil Seeds. Benin City, Nigeria: Nigerian Institute for Oil Palm Research, 1987.
MLA-viite (8. p.)Não informado. Nigerian Journal of Palms and Oil Seeds. Nigerian Institute for Oil Palm Research, 1987.
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