- Author: Professor Dr. Helmut Koch (auth.)
- Language: German
- Year: 2004
- Author: Dr. Helmut Koch (auth.)
- Language: German
- Year: 1977
Grundlagen der Wirtschaftlichkeitsrechnung: Probleme der betriebswirtschaftlichen Entscheidungslehre
pdf
- Author: Dr. Helmut Koch (auth.)
- Language: German
- Year: 1970
- Author: Helmut Koch (auth.)
- Language: English
- Year: 2002
- Author: Prof. Dr. Helmut Koch (auth.)
- Language: German
- Year: 1997
- Author: Ingenieur KTH. Dag Du Rietz Dr.-Ing. Helmut Koch (auth.)
- Language: German
- Year: 1948
- Author: Helmut Koch (auth.)
- Language: German
- Year: 1982
- Author: Dr. Helmut Koch (auth.)
- Language: German
- Year: 1980
- Author: Dr. Dr. h.c. Helmut Koch (auth.)
- Language: German
- Year: 1987
- Author: Dr. Helmut Koch (auth.)
- Language: German
- Year: 1961