Bremen, July 12, 1973 Part I 18:05
Bremen, July 12, 1973 Part IIa 19:40
Bremen, July 12, 1973 Part IIb 26:15
Lausanne, March 20, 1973 Part Ia 22:50
Lausanne, March 20, 1973 Part Ib 7:20
Lausanne, March 20, 1973 Part IIa 12:34
Lausanne, March 20, 1973 Part IIb 22:35