000 00296nam a2200121Ia 4500
008 220201s1970 xx 000 0 eng d
082 _bSHA
100 _aSharp John R.
245 0 _aInformation retrieval : Notes for students
260 _alondon
_bDeutsche,
_c1970
300 _a90
942 _2ddc
999 _c22152
_d22152