000 00327nam a2200133Ia 4500
001 72
008 150525s9999 xx 000 0 und d
020 _a0-13-603910-3
100 _aBeck Robert
245 _aMotivation Theories And Principles
250 _a2
260 _aNew Jerssey
_bPrentice-Hall,Inc
_c1983
300 _a,;ill.
999 _c25344
_d25344