Não informado. (1977). South African journal of chemistry. Foundation for Education, Science and Technology.
Citace podle Chicago (17th ed.)Não informado. South African Journal of Chemistry. Pretoria, Africa do Sul: Foundation for Education, Science and Technology, 1977.
Citace podle MLA (8th ed.)Não informado. South African Journal of Chemistry. Foundation for Education, Science and Technology, 1977.
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