Stuart C. Sherman, "Guide to the Manuscript Collections in the Brown University Library," Books at Brown, vol. XXV (1977), used in writing this entry.
The library has miscellaneous papers of several U.S. presidents—Abraham Lincoln, James Monroe, John Quincy Adams, Rutherford B. Hayes, Grover Cleveland, William McKinley, Theodore Roosevelt, and John F. Kennedy. These may include materials pertaining to Russia/USSR.