This crisp copper-engraved thematic chart shows good detail with coloring to indicate climatic regions rather than political divisions. Major areas are named for the river basins: Columbia and Colorado in the West, the Mississippi in the Midwest, and Mackenzie and Saskatscha in the North. A table at bottom gives the length of major rivers. A nicely colored and handsome sheet.
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Condition: A
A clean sheet with original outline color and very light toning along centerfold and edges of sheet.