<XML><RECORDS><RECORD><REFERENCE_TYPE>7</REFERENCE_TYPE><REFNUM>6885</REFNUM><AUTHORS><AUTHOR>Croft,W.B.</AUTHOR><AUTHOR>van Rijsbergen,C.J.</AUTHOR></AUTHORS><YEAR>1976</YEAR><TITLE>The efficiency of information retrieval</TITLE><PLACE_PUBLISHED> </PLACE_PUBLISHED><PUBLISHER>University of Queensland Press</PUBLISHER><PAGES>47-62</PAGES><LABEL>Croft:1976:6885</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>