000 00306nam a2200121Ia 4500
001 MPKV103783
008 120911s9999 xx 000 0 und d
245 _aEducational Psychology
_cSkinner Charles E.;
250 _a3rd
260 _aNew York
_bPrentica Hall
_c1951
300 _axi
_b791 pp
365 _b8 /-
999 _c67234
_d67234