000 00298nam a2200121Ia 4500
008 220204s9999 xx 000 0 und d
082 _a025.5:681.3
_bVAN
100 _aVan Rijsbergen, C J
245 0 _aInformation retrieval
250 _aEd.2
260 _aLondon
_bButterworths
_c1979
942 _cBK
999 _c37057
_d37057