Não informado. (2001). South African journal of plant and soil. Foundation for Education, Science and Technology.
Chicago-viite (17. p.)Não informado. South African Journal of Plant and Soil. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 2001.
MLA-viite (8. p.)Não informado. South African Journal of Plant and Soil. Foundation for Education, Science and Technology, 2001.
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