<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>6879</REFNUM><AUTHORS><AUTHOR>van Rijsbergen,C.J.</AUTHOR></AUTHORS><YEAR>1979</YEAR><TITLE>Information retrieval: theory and practice</TITLE><PLACE_PUBLISHED> Proceedings of the Joint IBM/University of Newcastle upon Tyne Seminar on Data Base Systems </PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><PAGES>1-14</PAGES><LABEL>van Rijsbergen:1979:6879</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>