000 00300nam a2200121Ia 4500
100 _aBell-gredler, Margaret E
020 _a0-02-307930-4
942 _cBK
245 _aLearning and instruction :theory and practice
260 _aCollier M, Canada
_c1986
082 _a370.1523 Bel
300 _avii,346
999 _c66951
_d66951