Wolfgang Hartmann

4 books

Nov 1, 2021
Cover of Looking at the Roots

Looking at the Roots

Jan 25, 2007
Cover of Marketing Excellence

Marketing Excellence

Nov 15, 2004
Cover of Kundenclubs & More

Kundenclubs & More

Jan 14, 1980
Cover of Geometrische Modelle Zur Analyse Empirischer Daten

Geometrische Modelle Zur Analyse Empirischer Daten