23
24
Supplement op 'Bulletin de la Ligue...' no.2(1932). By Olyff, François
Date 1932
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28
35
4th PES Summer University 1999 Date 1999
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36
Nürnberg, Germany, November 1996 Date 1996
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37
38
30 March - 6 April 1997. Debrecen, Hungary Date 1997
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40
O.W. Jodlow - Almatur; Huta Szklana, Kielce, Poland. 24 October 1 November 1998 Date 1998
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