(U.S. - Historical) Map Of The Conterminous United States Showing Routes Of The Principal Explorers From 1501 to 1844..., U.S.G.S., 1983
Enlarged from the classic U.S.G.S. bulletin 1212 that looks at the changing borders and evolution of the country, here is a great reference map. If you want a single overview of which explorations went where, this is it. Includes a number of the early key roads, all on top of a simple U.S. map. Condition is very good. Image size is approximately 16.5 x 23.25 (inches)
