Cross section through the Standard Tunnel [Ashcroft District, Pitkin County, Colorado] / Geo. W. Lloyd, M.E. [18--?]

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Cross section through the Standard Tunnel [Ashcroft District, Pitkin County, Colorado] / Geo. W. Lloyd, M.E. [18--?]

1 ms. map : col., linen ; 58 x 92 cm.

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Lloyd, George W.

http://n2t.net/ark:/99166/w6cg2j9g (person)