<XML><RECORDS><RECORD><REFERENCE_TYPE>7</REFERENCE_TYPE><REFNUM>6875</REFNUM><AUTHORS><AUTHOR>van Rijsbergen,C.J.</AUTHOR></AUTHORS><YEAR>1981</YEAR><TITLE>Retrieval effectiveness</TITLE><PLACE_PUBLISHED> Information retrieval experiment, (ed. K. Sparck Jones) </PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><PAGES>32-43</PAGES><LABEL>van Rijsbergen:1981:6875</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>