Two items: one FDC with a cachet honoring the Mayo brothers, signed in black felt tip, “Jonas Salk”; and one booklet entitled ‘The Arabs Need and Want Peace, But,’ 6 x 9, 31 pages, signed and inscribed in black felt tip, “For Dr. Bacal—with best wishes—Albert B. Sabin.” In overall very fine condition. RR Auction COA.
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