Article MacPhail, Ian; Sutton, Marjorie (1997)
A census of copies of Thomas Say's American conchology, New Harmony, 1830-1834 [Philadelphia 1837?]. Papers of the Bibliographical Society of America (pp. 51-64). (/isis/citation/CBB000073606/) unapi

Article Stroud, Patricia Tyson (1995)
Forerunner of American conservation: Naturalist Thomas Say. Forest and Conservation History (pp. 184-190). (/isis/citation/CBB000068163/) unapi

Book Stroud, Patricia Tyson (1992)
Thomas Say, New World naturalist. (/isis/citation/CBB000061686/) unapi

Article Summers, Gerald (1982)
A bibliography of the scientific writings of Thomas Say (1787-1834). Archives of Natural History (pp. 69-81). (/isis/citation/CBB000006940/) unapi

Article Johnson, Richard I. (1975)
First paper on the conchology of the United States by an American author, Thomas Say, 1817. Journal of the Society for the Bibliography of Natural History (pp. 265-267). (/isis/citation/CBB000012723/) unapi