000			00441nam a22001577a 4500
001			CATREF019487
008			110517s9999 xx 000 0 und d
041			_aeng
082	0		_a029.7 VIC
100	1		_aVickery, B. C.
245			_aOn retrieval system theory _cB. C. Vickery
260			_aLondon : _bButterworths, _c1965.
300			_axii, 191 p. ; _c21 cm.
500			_aIncludes index.
650		4	_aInformation retrieval theory
999			_c136022 _d136022