Say, T. (1823). Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and '20, by order of the Hon. J.C. Calhoun, Sec'y of War: under the command of Major Stephen H. Long. In: James, E. (ed.) H.C. Carey and I. Lea, Philadelphia 2. ZooBank: B1071EBC-8655-4B54-998B-C2B48217FABA
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