000 00325nam a22001457a 4500
008 210315b ||||| |||| 00| 0 eng d
020 _a9780534258726
041 _aeng
080 _22nd
_a82
082 _a82
100 _a21
101 _aGJL
245 _aImplementing Mastery Learning
_cGuskey, TH. R
942 _2udc
_cBK
999 _c56614
_d56614