Say, T. 1818. Account of two new genera, and several new species, of fresh water and land shells. Journal of the Academy of Natural Sciences of Philadelphia 1(2):276-284.
Say, T. 1819. Article "Conchology." in W. Nicholson (ed.). American Edition of the British Encyclopedia or Dictionary of Arts and Sciences, Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge. 3rd Edition, Samuel, A. Mitchel and Horace Ames, Philadelphia, Pennsylvania.
Say, T. 1821. Descriptions of univalve shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia 2(1):149-179.
Say, T. 1822. Description of univalve terrestrial and fluviatile shells of the United States. Journal of the Academy of Natural Sciences of Philadelphia 2(2):370-381.
Say, T. 1824. Narrative of an expedition to the source of St. Peter's River, etc., under the command of Major Stephen H. Long. Long's Expedition. 2:256-265.
Say, T. 1825. Appendix Part I. - Natural History. 1. Zoology C. Class Mollusca in W.H. Keating, Narrative of an Expedition to the Source of St. Peter's River, etc., under the command of Stephen H. Long, U.S.T.E. 2:5-13.
Say, T. 1825. Descriptions of some new species of fresh water and land shells of the United States.