000 00276nam a22001091 4500
050 0 0 _aMED. BF319
_b.F4
100 1 _aFerster, Charles B.
245 1 0 _aSchedules of reinforcement,
260 _aNew York,
_bAppleton-Century-Crofts
_c[1957]
300 _a741 p. :
_bill.
942 _cBK
999 _c15102
_d15102