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Bằng Wagner, Henry R. (Henry Raup), 1862-1957
Được phát hành 1933 -
News of the Plains and Rockies 1803-1865original narratives of overland travel and adventure selected from the Wagner-Camp and Becker bibliography of Western AmericanaBookBằng White, David A., 1927-2004
Được phát hành 1996