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Withy & Ryal |
Twelve Plates of English Coins |
London 1756 |
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Snelling, Thomas |
A view of Jettons |
London 1769 |
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Rouyer & Houcher |
Histoire du Jeton au Moyen Age |
Paris 1858 |
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H.B.E. & S. Fox |
Numismatic History of the Reigns of Edward I., II., III. |
British Numismatic Journal 1909 to 1913/14 |
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Barnard, F.P. |
The Casting Counter and the Counting Board |
Oxford 1917 |
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Lawrence L.A. |
On Some Early English Reckoning Counters |
Numismatic Chronicle 1938 |
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Pullan, J M. |
The History of the Abacus |
London 1968 |
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Berry, George |
Medieval English Jettons |
Spink 1974. |
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Mitchener, Michael |
Jetons, Medallets and Tokens |
Seaby 1988 |
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