1
2
3
4
5
6
7
Published: Frankfurt/Main [u.a.] : Campus-Verl, 1992
Book
8
9
10
Published: Bonn : Dietz, 1993
Book
11
12
13
14
15
16
17
18
Published: Luxembourg : Publ. Off. of the Europ. Union, 2013
Book
19
Published: Wien : Südwind-Verl, 2000
Book
20
Published: München : riva, 2015
Book