4. By the king, a proclamation for giving currency to a new coinage of copper money of one penny and two penny pieces Great Britain. Sovereign (1760-1820 : George III) Great Britain s.n. Book Online
5. Modern universal table the most copious and authentick that ever was published, of the present state of the real and imaginary monies of the world ... s.n. Great Britain? Book Online
7. Money / Eric Lonergan. Lonergan, Eric Durham, UK : Acumen Pub. Ltd., 2009. Book Physical ReCAP HG222.3 .L66 2009g
8. Money: its connexion with rising and falling prices / by Edwin Cannan Cannan, Edwin, 1861-1935 Westminister : P. S. King & son, ltd., 1926. Book Physical ReCAP Econ 4529.26.50