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: Houtmans M M
: The influence of external rewards and performance feedback on dynamic aspects of task motivation : ( ): Nijmegen : 1974 : : Houtmans M.J.M. The influence of external rewards and performance feedback on dynamic aspects of task motivation. N.J.: Nijmegen, 1989. 153 p. : : : 3104, : 0, : 0. |