The Journal of Ancient Numismatics Volume 1, Issue 2
Methods of coin debasement - Wikipedia
What Is A Clipped Planchet? How Can You Tell If You've Got A Genuine Clipped Planchet Error Coin Or A Damaged Coin? Here Are 4 Things To Look For! | The U.S.
coin | British Museum
File:17th century coin clipping shears.JPG - Wikipedia
When did clipping die out? – Numista
What is coin clipping? – CoinFAQ
Toenail Hoard' of 500 coin clippings found in Forest of Dean - BBC News