Não informado. (1975). Dutch theses. Netherlands Universities Foundation for International Cooperation.
Citace podle Chicago (17th ed.)Não informado. Dutch Theses. The Hague, Holanda: Netherlands Universities Foundation for International Cooperation, 1975.
Citace podle MLA (8th ed.)Não informado. Dutch Theses. Netherlands Universities Foundation for International Cooperation, 1975.
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