| Alfred Hart Advance of civilization. Scene on the Humboldt Desert [Central Pacific Railroad, Nevada.] 1865-1869 Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s00622 (digital file from original photo, front) LC-DIG-stereo-2s00622 (digital file from original photo, back) LC-USZ62-56976 (b&w film copy neg. of full stereo) LL/108950
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