000 00273nam a2200121Ia 4500
008 220201s1968 xx 000 0 eng d
082 _bBET
100 _aBetts, P. W.
245 0 _aSupervisory studies
260 _aLondon
_bMacdonald
_c1968
300 _a454
942 _2ddc
999 _c18201
_d18201