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thomas say (1787-1834)

Account of an expedition from Pittsburgh to the Rocky Mountains

By Edwin James

Thomas Say, early American naturalist

By Harry B. Weiss

Thomas Say

By Harry B. Weiss

Thomas Say

By Patricia Tyson Stroud

Asa Gray papers

By Asa Gray

Marian S. Carson collection of manuscripts

By Marian S. Carson

A biographical sketch of the late Thomas Say, esq

By Benjamin Hornor Coates