Obsoletes: Build Your Library
I've always thought that the area of U.S. obsolete notes remains the wild west of paper money; there is much in the field that has yet to be discovered and mapped. But there are a great many references that have been created over the last century that collectors of state notes can use to help build their collections. Many works have been sponsored by the SPMC over the last 50 years. Here is a partial list of titles -- I am sure there are others still missing in my library:
