"congresses and meetings N-O"@en . "congrès et journées d'études N-O"@fr . "congressi, convegni, giornate di studio N-O"@it . "Kongresse und Tagungen N-O"@de . . . . "Ohlstadt 1996 (xPraxKongrN-O)"@de . . "Ohlstadt 1996"@de . .