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