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-1 July, 1987 / ed. by Hans H. Bock
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-1 July, 1987