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• Author of the reproduced work: Opalka Roman
• Photographer: Mates Robert E. - Katz Paul
• Caption: Roman Opalka, allestimento delle due mostre alla John Weber Gallery di New York: marzo 1974 e marzo 1975. Foto Robert E. Mates e Paul Katz.
• Year of the work: 1974
• Image typology: art installation
• Instalment form
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