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Socialist Czechoslovakia
Government Committee for Tourism in Czechoslovakia
Czechoslovakia, now known as the two separate countries of the Czech Republic and Slovakia, has a long tradition of mining. One of these minerals is…
Lands of the Eastern Mediterranean
National Geographic Society (U.S.) Cartographic Division
Verdigris is a green colorant made from the corrosion of copper. Its uses originate from Spain and Greece, with Cyprus being one of the best original…
Red, Orange, and Yellow
Zagorski, M.
Green, Blue and Purple
Zagorski, M.
Chalk
Rother, Grace
Charcoal
Rother, Grace
Iron Gallotannate Ink
Rother, Grace
Red Ochre
Rother, Grace
Sepia
Rother, Grace
Soot Ink
Rother, Grace
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