<XML><RECORDS><RECORD><REFERENCE_TYPE>0</REFERENCE_TYPE><REFNUM>5621</REFNUM><AUTHORS><AUTHOR>Van Rijsbergen,C.J.</AUTHOR><AUTHOR>Sanderson,M.</AUTHOR></AUTHORS><YEAR>1999</YEAR><TITLE>The impact on retrieval effectiveness of skewed frequency distributions</TITLE><PLACE_PUBLISHED>ACM Transactions on Information Systems, Volume 17 No 4 </PLACE_PUBLISHED><PUBLISHER>ACM</PUBLISHER><PAGES>440-465</PAGES><ISBN>0734 2047</ISBN><LABEL>Van Rijsbergen:1999:5621</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>