<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>6847</REFNUM><AUTHORS><AUTHOR>van Rijsbergen,C.J.</AUTHOR></AUTHORS><YEAR>1992</YEAR><TITLE>Non Boolean search methods in information retrieval</TITLE><PLACE_PUBLISHED> AGARD Conference Proceedings, 505 </PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><PAGES>5.1-5.12</PAGES><LABEL>van Rijsbergen:1992:6847</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>