1852
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Baird, Spencer F. and Charles Girard. Reptiles. Pages 336-365 in Howard Stansbury's, An expedition to the valley of the Great Salt Lake of Utah: Including a description of its geography, natural history, and minerals, and an analysis of its waters: With an authentic account of the Mormon Settlement: Also, a reconnoissance [sic] of a new route through the Rocky Mountains. Sampson Low, Son, and Company., Philadelphia, Pennsylvania. 487pp. US House of Representatives, Washington. pp.
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