@book{numophylacium-macdonald-coin-types,
  title = {Coin Types: Their Origin and Development},
  author = {George Macdonald},
  year = {1905},
  language = {English},
  url = {https://numophylacium.com/works/macdonald-coin-types/},
  pdf = {https://numophylacium.com/library/cointypestheiror00macduoft/cointypestheiror00macduoft.pdf},
  note = {Digitized reference record in Numophylacium Graecum; source archive.org cointypestheiror00macduoft}
}