Paper currency grading (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Paper currency grading" in English language version.

refsWebsite

Global rank English rank

2books.google.com

3^rd place

3^rd place

1pcgscurrency.com

low place

low place

low place

low place

books.google.com

George S. Cuhaj, William Brandimore (2011). Standard Catalog of United States Paper Money. F+W Media, Inc. ISBN 9781440217203.
Arthur L. Friedberg, Ira S. Friedberg (2006). Paper Money of the United States: A Complete Illustrated Guide With Valuations. Coin & Currency Institute. p. 9. ISBN 9780871845184.

pcgscurrency.com

"Numerical Grading Scale". www.pcgscurrency.com. Retrieved September 10, 2016.

pmgnotes.com

"PMG Paper Money Grading Scale". www.pmgnotes.com. Retrieved September 10, 2016.