1
Kühlmann, Wilhelm,
W. De Gruyter,,
2012,
3
Killy, Walther
W.De Gruyter,,
2011,
4
Merker, Paul
W. De Gruyter,,
1984,
5
Merker, Paul
W.De Gruyter,,
1977,
6
Merker, Paul
W.De Gruyter,,
1965,
7
Merker, Paul
W.De Gruyter,,
1958,