Hermann Hagedorn (18 July 1882 – 27 July 1964)[1] was an American author, poet and biographer.
- ^ "Hermann Hagedorn, Biographer Of Theodore Roosevelt, Is Dead; Author of Several Books on President, His Family and His Associates Was 82". The New York Times. July 28, 1964. Archived from the original on March 28, 2023. Retrieved January 21, 2024.