1
von Singer, Robert N. (Autor),
Erschienen in The research quarterly of the American Association for Health, Physical Education and Recreation, Washington D.C., 44 (1973), 2, S. 185-191, Lit.
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“...Singer, Robert N....”Erschienen in The research quarterly of the American Association for Health, Physical Education and Recreation, Washington D.C., 44 (1973), 2, S. 185-191, Lit.
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