Two items: a newsletter from The Salk Institute, Summer 1977, No. 16, 8.5 x 11, signed above his image in ink by Francis Crick; and a booklet for the article 'Origin of Concatemeric T7 DNA,' five pages, 8.5 x 10.75, signed on the front cover in. ballpoint by James D. Watson. In overall fine condition, with a horizontal fold to the newsletter.
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