Obituaries. Theodore Sizer(PDF). American Antiquarian Society. October 1967. pp. 213–216. Archived(PDF) from the original on 7 August 2022. Retrieved 19 January 2023.
Obituaries. Theodore Sizer(PDF). American Antiquarian Society. October 1967. pp. 213–216. Archived(PDF) from the original on 7 August 2022. Retrieved 19 January 2023.