000 00411nam a2200145Ia 4500
008 230524s9999 xx 000 0 und d
040 _cUDSM
050 _aLB1028.5.L45
100 1 _aLeith, G. O. M.
_eAuthor
245 1 2 _aA handbook of programmed learning
260 _aEdgbaston:
_bUniversity of Birmingham,
_c1966
300 _a152p.:
_bill.;
_c22cm.
650 1 _aProgrammed instruction
942 _2lcc
_cBK
_n0
999 _c51903
_d51903