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Being in part fulfillment of the requirements for the degree of Doctor of Philosophy, University of Cape Town, 1960.
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Allanson, B.R., Gieskes, J.M.T.M. Part I The physical, chemical anf biological conditions in the Jukskei-Crocodile River System. Hydrobiologia 18, 2–76 (1961). https://doi.org/10.1007/BF00731363
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DOI: https://doi.org/10.1007/BF00731363