1
Grumach, Ernst
W.de Gruyter,,
1965,
2
Grumach, Ernst
W.de Gruyter,,
1966,
3
4
Grumach, Ernst
W.de Gruyter,,
1980,
5
Grumach, Ernst
W.de Gruyter,,
1985,
6
Grumach, Ernst
W.de Gruyter,,
1999,