"Photolithographed preliminary sheet for the use of the parties in the field and subject to revision." Library's copy has separated into 2 sheets (each 82 x 60 cm.), at center fold. Relief shown by contours and spot heights.
1 map ; 77 x 113 cm.
Extent of Digitization
Scale [1:126,720]. 1 in. = 2 miles
(W 111⁰00ʹ--W 109⁰15ʹ/N 46⁰30ʹ--N 45⁰39ʹ)., 126720, a, N0453900, N0463000, W1091500, and W1110000
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