<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>6897</REFNUM><AUTHORS><AUTHOR>van Rijsbergen,C.J.</AUTHOR></AUTHORS><YEAR>1973</YEAR><TITLE>Hierarchic clustering in document retrieval</TITLE><PLACE_PUBLISHED>Proceedings of the NATO Advanced Study Institute for On-Line Mechanised Information Retrieval Systems, Copenhagen, Denmark </PLACE_PUBLISHED><PUBLISHER>N/A</PUBLISHER><LABEL>van Rijsbergen:1973:6897</LABEL><ABSTRACT> </ABSTRACT></RECORD></RECORDS></XML>