The mission of the Bureau of Engraving and Printing (BEP) is "to develop and produce United States currency notes. As its primary function, the BEP prints billions of dollars - referred to as Federal Reserve Notes - each year for delivery to the Federal Reserve System." The BEP began in 1862. During its early years, it was known as the National Currency Bureau.
Government Documents provides access to many BEP publications, including the following series:
Annual reports (T 18.1:)
Circulars (T 18.4:)
Monthly statement of United States currency and coin (T 63.118:)
We also have Congressional reports, documents, committee hearings, and prints related to currency, counterfeiting, and the BEP. Search for these using ProQuest Congressional (UHM login required).