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An Introductory Guide to Ancient Greek and Roman Coins Volume II: Regal Coins of the Hellenistic Age (downloadable PDF)
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The Oxford Handbook of Greek and Roman Coinage by Metcalf, W. E.
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Infrastructure and Distribution in Ancient Economies by Bernhard Woytek (ed.) Proceedings of a conference held at the Austrian Academy of Sciences, 28–31 October 2014