Signed book: The Survival of the Wisest. Later printing. NY: Harper and Row, 1973. Hardcover with dustjacket, 5.75 x 8.5, 124 pages. Signed on the first free end page in black ink by Salk. In fine condition, with a bit of mild toning to top of signed page, and a bit of scattered light wear to dustjacket. RRAuction COA.
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