DR1995:0278:013:002:002
1976
DR1995:0274:049:002:001
15-16 July 1980
DR1995:0293:065:001
15 February 1981
Unibad: notes and sketches
DR1995:0274:049:003
10 April 1980
Unibad: notes and sketches
DR1995:0274:049:004
10 April 1980
Unibad: notes and sketches
DR1995:0274:049:005
10 April 1980
Unibad: notes and sketches
DR1995:0274:049:006
10 April 1980
B-Air: presentation drawing
DR2004:1085:001
1982 or 1983?
DR2004:1087:001
August 1982
DR2004:1082:001
between 1981 and 1983