17-23 Oct. 1957 [Federal Council]
10-13 Nov. 1956 [Federal Council]
4-7 Feb. 1956 [Federal Council]
6-9 Nov. 1954 [Federal Council]
27-28 Oct. 1953 [Federal Council]
27-28 Oct. 1952 [Federal Council]
19 Nov. 1951 [Federal Council]
![17-23 Oct. 1957 [Federal Council]](/img/placeholder.gif?1773707079 "17-23 Oct. 1957 [Federal Council]")