Index to the William Howard Taft papers.
Library of Congress.Manuscript Division
Washington : U.S. Govt. Print. Off.,
1972.
v. 1. Introduction and presidential period subject titles -- v. 2. A-C -- v. 3. D-H -- v. 4. I-M -- v. 5. N-S -- v. 6. T-Z.
Taft, William H. (William Howard), 1857-1930
Also available in electronic form on the Library of Congress Web site.