This primary source comes from the Collection DDE-WHCF: White House Central Files (Eisenhower Administration).
Full Citation: White House Press Release With the Text of Citations Given by the President to Dr. Jonas E. Salk and the National Foundation for Infantile Paralysis; 4/22/1955; OF 117-I-1 Salk Polio Vaccine (8); Official Files, 1953 - 1961; Collection DDE-WHCF: White House Central Files (Eisenhower Administration); Dwight D. Eisenhower Library, Abilene, KS. [Online Version, https://www.docsteach.org/documents/document/white-house-press-release-about-dr-jonas-e-salk, May 29, 2023]