000 00290nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a025.5
_bVIC
100 _aVickery, B C
245 0 _aOn retrieval system theory
250 _aEd.2
260 _aLondon
_bButterworths
_c1965
942 _cBK
999 _c20837
_d20837