Proceedings and papers [of the] 2d Gondwana Symposium, South Africa, July to August, 1970

International Union of Geological Sciences Sub-Commission on Gondwana Stratigraphy and Palaeontology, South African Council for Scientific and Industrial Research, University of Cape Town, University of the Witwatersrand, International Symposium on Gondwana Stratigraphy and Palaeontology (2d 1970 University of Cape Town and University of the Witwatersrand)