The Hydroplane Programme Covers Project
Dessau
 August 18, 1974 |
 June 22, 1980 |
 June 21, 1981 |
 June 26, 1983 |
 June 24, 1984 |
 June 30, 1985 |
 June 22, 1986 |
 June 21, 1987 |
 June 19, 1988 |
 June 18, 1989 |
 June 16, 1991 |
 May 26, 2002 |
 June 12, 2005 |
 June 7, 2009 |
 May 22, 2011 |
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