Lot of 2 Trade Paperbacks by and about John Wesley Powell:

-The Exploration of the Colorado River and Its Canyons, by John Wesley Powell; Dover Trade PB, VG; clean throughout w/ light edge- and corner-wear

- Down The Great Unknown, by Edward Dolnick, Perennial Trade PB, 2002 ; VG; clean throughout w/ light edge- and corner-wear 

See photos for details . . .

Clean throughout; NO WRITING and NO UNDERLINING in text

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