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A survey of mathematical marketing models
Leeflang, P. S. H.; Koerts, J. - 1971
Persistent link: https://www.econbiz.de/10001510973
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Statistical inference and subjective probabilities
Koerts, J.; Leede, E. de - 1972 - Vervielf.
Persistent link: https://www.econbiz.de/10001571959
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On the notion of probability : a survey
Leede, E. de; Koerts, J. - 1977
Persistent link: https://www.econbiz.de/10001563143