1941
Montana. State Highway Commission.
1:127k
1899
Ayers, H.B.
1:508k
1878
Twining, W.J.
1:507k
1899
Ayers, H.B.
1:911k
1900
Ayers, H.B.
1:911k
1966
Shane, Ralph M.
1935
C&GS
1:500k
1938
United States. Post Office Department
1:766k
1909
Rand McNally and Company
1:2m
1897
Rand McNally and Company
1:2m