Forerunner to the U.S. Army Corps of Engineers and NOAA

Notes of a military reconnaissance from Fort Leavenworth, in Missouri, to San Diego, in California, including parts of the Arkansas, Del Norte, and Gila Rivers / By Lieut. Col. W.H. Emory. Made in 1846-7, with the advanced guard of the "Army of the West".

Report of an expedition down the Zuni and Colorado rivers / by Captain L. Sitgreaves.

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Notes of a military reconnaissance from Fort Leavenworth, in Missouri, to San Diego, in California, including parts of the Arkansas, Del Norte, and Gila Rivers / By Lieut. Col. W.H. Emory. Made in 1846-7, with the advanced guard of the "Army of the West".

Report of an expedition down the Zuni and Colorado rivers / by Captain L. Sitgreaves.