000 00284nam a2200109Ia 4500
008 161022s9999 xx 000 0 und d
100 _aAusubel David P
245 _aTheory And problems of Child Development
260 _bGrune &Stratton New Yark
_c1962
300 _a650
942 _cBK
999 _c54275
_d54275