1823
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James, Edwin. Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819, 1820. By order of the Hon. J. C. Calhoun, Secretary of War, under the command of Maj. S. H. Long, of the United States Top. Engineers. Compiled from the notes of Major Long, Mr. T. Say, and other gentlemen of the party by Edwin James, botanist and geologist to the expedition. In three volumes. [Volume 2]. Longman, Hurst, Rees, Orme and Brown, London, England. 356pp.
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1908
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Ruthven, Alexander G. Variations and genetic relationships of the garter-snakes. Bulletin of the United States National Museum (61):1-201
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1962
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Rossman, Douglas A. Thamnophis proximus (Say), a valid species of garter snake. Copeia 1962(4):741-748
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1963
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Rossman, Douglas A. The colubrid snake genus Thamnophis: A revision of the sauritus group. Bulletin of the Florida State Museum, Biological Sciences 7(3):99-178
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1970
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Rossman, Douglas A. Thamnophis proximus. Catalogue of American Amphibians and Reptiles (98):1-3
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1972
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Baker, Robert J., George A. Mengden, and James J. Bull. Karyotypic studies of thirty-eight species of North American snakes . Copeia 1972(2):257-265
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1977
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Gartside, Donald F., James S. Rogers, and Herbert C. Dessauer. Speciation with little genic and morphological differentiation in the Ribbon Snakes Thamnophis proximus and T. sauritus (Colubridae). Copeia 1977(4):697-705
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1985
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Lawson, Robin. Molecular studies of Thamnophiine snakes. Dissertation. Louisiana State University, Baton Rouge. 191pp.
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1991
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Collins, Joseph T. Amphibians and reptiles in the upper Mississippi river valley: Systematic and distributional problems. Journal of the Tennessee Academy of Science 66(4):149-152
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1994
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De Queiroz, Alan and Robin Lawson. Phylogenetic relationships of the garter snakes based on DNA sequence and allozyme variation. Biological Journal of the Linnean Society 53:209-229
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1996
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Dundee, Harold A. Some reallocations of type localities of reptiles and amphibians described from the Major Stephen H. Long Expedition to the Rocky Mountains, with comments on some of the statements made in the account written by Edwin James. Tulane Studies in Zoology and Botany 30:75–89
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2002
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de Queiroz, Alan, Robin Lawson, and Julio A. Lemos-Espinal. Phylogenetic relationships of North American garter snakes (Thamnophis) based on four mitochondrial genes: How much DNA sequence is enough?. Molecular Phylogenetics and Evolution 22(2):315-329
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2008
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Genoways, Hugh H. and Brett C. Ratcliffe. Engineer Cantonment, Missouri Territory, 1819-1820: America's first biodiversity inventory. Great Plains Research 18(Spring):3-31
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2010
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Woodman, Neal. History and dating of the publication of the Philadelphia (1822) and London (1823) editions of Edwin James' Account of an expedition from Pittsburgh to the Rocky Mountains. Archives of Natural History 37(1):28-38
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