000 00260nam a2200109Ia 4500
008 230515s9999||||xx |||||||||||||| ||und||
100 _aSkinner B.F
_952324
245 0 _aWalden Two
260 _bThe Macmillan Company
_c1962
300 _a320
942 _cBK
_pCL
999 _c191204
_d191204