Ciani, Louis. Les monnaies royales françaises de Hugues Capet a Louis XVI avec indication de leur valeur actuelle. (Paris, 1926). 502 pages with line drawings of coins illustrated throughout. Hardbound in later library binding. A useful reference for the royal issues of France. Duplessy relied on Ciani for cross-referencing, as well as his illustrations of the coins. Near New condition.
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