Report of the Geological Exploration of the Fortieth Parallel, made by order of the Secretary of War according to acts of Congress of March 2, 1867, and March 3, 1869 /
under the direction of A. A. Humphreys by Clarence King.

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Full view   v.1 University of Illinois at Urbana-Champaign
Full view   v.2 University of Michigan
Full view   v.2 University of Illinois at Urbana-Champaign
Full view   v.3 University of Illinois at Urbana-Champaign
Full view   v.3 University of Minnesota
Full view   v.4 University of Illinois at Urbana-Champaign
Full view   v.4 University of Minnesota
Full view   v.5 University of Illinois at Urbana-Champaign
Full view   v.5 University of Minnesota
Full view   r6 University of Illinois at Urbana-Champaign
Full view   v.6 University of Minnesota
Full view   r7 University of Illinois at Urbana-Champaign