Links
- American Numismatic Society
- British Association of Numismatic Societies
- British Museum, Department of Coins and Medals
- British Numismatic Society
- Celtic Coin Index
- Fitzwilliam Museum, Department of Coins and Medals
- International Numismatic Commission
- Oriental Numismatic Society
- Portable Antiquities Scheme
- Roman Provincial Coinage (RPC) Online
- The Royal Mint
- Royal Numismatic Society
- Sylloge Nummorum Graecorum