Signed book: The Survival of the Wisest. Later printing. NY: Harper & Row, 1973. Hardcover with dust jacket, 5.75 x 8.5, 124 pages. Signed and inscribed on the half-title page in black ink, "For John & David Keppel—I'm sure you will see some resemblances, encouraging & hopeful, Jonas Salk, 5 Oct 1978. In fine condition, with light wear to the dust jacket.
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