- Author: Neale Donald Walsch Susanne Kahn-Ackermann
- Language: German
- Year: 1997
- Author: G. Flatten (auth.) Prof. Dr. R. Ackermann Prof. Dr. Jens E. Altwein Prof. Dr. Peter Faul (eds.)
- Language: German
- Year: 1991
- Author: Prof. Dr. F. Eisenberger (auth.) Professor Dr. med. Rolf Ackermann (eds.)
- Language: German
- Year: 1988
- Author: R. Ackermann (auth.) Professor Dr. med. Reinhard Nagel (eds.)
- Language: German
- Year: 1993
- Author: Dr. jur. Brunhilde Ackermann (auth.)
- Language: German
- Year: 1997
- Author: U. Ackermann (auth.) Prof. Dr. Johannes F. H. Gauwerky (eds.)
- Language: German
- Year: 2003
- Author: Ulrich von Alemann (auth.) Heike Ackermann Barbara Bröcker Bernhard Claußen Adolf Noll Lutz-Rainer Reuter (eds.)
- Language: German
- Year: 1989
