Historians of business, taxation, economics and related topics may be interested in a new database available from HeinOnline: "Taxation & Economic Reform in America: A Historical Archive, 1791-2009." One subset of the collection contains legislative histories and other hard-to-find administrative documents relating to Internal Revenue Acts from 1909 to 1950. The collection has plenty of more modern materials, too. This is a welcome resource for tax scholars and others.