Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. (1964). Proceedings of Symposium on Soil Engineering Mapping. South African Institution of Civil Engineers.
Chicago-referens (17:e uppl.)Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. Proceedings of Symposium on Soil Engineering Mapping. Johannesburg: South African Institution of Civil Engineers, 1964.
MLA-referens (8:e uppl.)Symposium on Soil Engineering Mapping la Hermosa Guest Farm Transvaal. Proceedings of Symposium on Soil Engineering Mapping. South African Institution of Civil Engineers, 1964.
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