000 00260nam a2200109Ia 4500
008 161118s2016 xx 000 0 und d
082 _a630.7 K7F6
100 _aKrebs, Alfred H.
245 0 _aFor More Effective Teaching, 1954.
260 _c1954
942 _2ddc
999 _c19529
_d19529