"congresses and meetings U-Z"@en . "congrès et journées d'études U-Z"@fr . "congressi, convegni, giornate di studio U-Z"@it . "Kongresse und Tagungen U-Z"@de . . . . "Washington 1986 (xPraxKongrU-Z)"@de . . "Washington 1986"@de . .