* [http://www.usmint.gov/kids/ US Mint - H.I.P.] * [http://www.usmint.gov/ US Mint] * [http://www.moneyfactory.gov/ US Bureau of Engraving and Printing] * [http://www.federalreserve.gov/ Federal Reserve System] * [http://www.money.org American Numismatic Association]