- Author: M. Becke-Goehring A. Kettrup H. Specker W. Strohmeier F. Freund (auth.)
- Language: German
- Year: 1968
- Author: Georg Freund (auth.)
- Language: German
- Year: 2009
- Author: Georg Freund (auth.)
- Language: German
- Year: 2010
- Author: W. A. Freund (auth.)
- Language: German
- Year: 1913
- Author: Winfried Freund (auth.)
- Language: German
- Year: 1981
- Author: Bill Freund (auth.)
- Language: English
- Year: 1984
- Author: Michele Crump and LeiLani Freund (Auth.)
- Language: English
- Year: 2012
- Author: Dr. Michael Freund (auth.)
- Language: German
- Year: 1997
Hygiene der Ehe
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- Author: Prof. Dr. Hermann Freund (auth.)
- Language: German
- Year: 1922