1
Published: 1990
Superior document: Conturen 11.1990,Feb. = Vip Nr. 36A
2
Published: [1979]
Superior document: Europäisches Forum Alpbach 1978
3
Published: [1987]
Superior document: Europäisches Forum Alpbach 1986
4
“...Europäisches Forum Alpbach...”
5
Published: 2005
6
Published: 1992