000 00336nam a2200157Ia 4500
100 _aSkinner, C. E.
020 _a978-81-203-0302-7
250 _a4th ed.
365 _b325
942 _cBK
654 _a
245 _aEducational psychology
260 _aNew Delhi
_bPHI Learning
_c1959
082 _a370.15
300 _bPb
_ax,755
999 _c415520
_d415520
041 _aeng