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The biological standard of living in comparative perspective: Contributions to the conference Held in Munich, January 18-22, 1997, for the XIIth Congress of the International Economic History Association
Einrichtung zum Erzeugen eines viereckigen, leuchtenden Feldes und Verwendung einer solchen Einrichtung bei einer Optikvorrichtung mit einer zu beleuchtenden Fläche vorbestimmten Form