| Documents of the René Richard Exposition in 1992/1993 in "La Musée des Beaux Arts", in La Chaux-de-Fonds, Switzerland. The Official Guide to the Exposition. |
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| (Original chez Dr. Urgel Pelletier) | ||
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The Press Release. |
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| (Original chez Dr. Urgel Pelletier) | ||
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| (Original chez Dr. Urgel Pelletier) | ||
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