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von Ryssen, J.C.J. van (Autor),
Erschienen in South African journal for research in sport, physical education and recreation, 11 (1988), 2, S. 75-88, Lit.
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“...Eloff, F.C....”Erschienen in South African journal for research in sport, physical education and recreation, 11 (1988), 2, S. 75-88, Lit.
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