Abraham Flexner and George D. Birkhoff Correspondence, ecca77a0-d3cd-4d5d-9cf5-74b33edd132a. Shelby White and Leon Levy Archives Center.
Cite Item Description
Abraham Flexner and George D. Birkhoff Correspondence, ecca77a0-d3cd-4d5d-9cf5-74b33edd132a. Shelby White and Leon Levy Archives Center. https://archives.ias.edu/repositories/2/digital_objects/344 Accessed March 25, 2023.
