000
00247nam a22001097a 4500
003
OSt
008
230828b |||||||| |||| 00| 0 eng d
082
_a
370.15
_b
S49E
100
_a
Skinner, C. F.
245
_a
Educational Psychology
942
_2
ddc
_c
BK
999
_c
30673
_d
30673