1
Weidner, Ernst.
Walter de Gruyter,,
1971,
2
Weidner, Ernst.
Walter de Gruyter,,
1975,
3
Weidner, Ernst.
Walter de Gruyter,,
1976,
4
Weidner, Ernst.
Walter de Gruyter,,
1993,
5
Weidner, Ernst.
Walter de Gruyter,,
2003,
6
Weidner, Ernst.
Walter de Gruyter,,
2006,
7
Weidner, Ernst.
Walter de Gruyter,,
2006,
8
Weidner, Ernst.
Walter de Gruyter,,
2006,