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Verfahren zur Darstellung blauer bis grünblauer Azofarbstoffe aus Tetrazodiphenyl oder ähnlichen Körpern, a-Naphtylamin und Dioxynaphtalinmonosulfosäure S
The purchase of this seal matrix was made possible by flagrant from the MGC Purchase Grant Fund, administered by the Victoria & Albert Museum, to whom the Society is grateful.·