Classification and related methods of data analysis proceedings of the First Conference of the International Federation of Classification Societies (IFCS), Technical University of Aachen, F.R.G., 29 June- July 1987 - Block, Hans Hermann; International Federation of Classification Societies. Conference (1st : 1987 : Rheinisch-Westfalische Technische Hochschule Aachen). (Amsterdam North-Holland, 1988)
Keywords: Cluster analysis -- Congresses; Pattern perception -- Congresses