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द्वारा Johnson, Spencer
प्रकाशित 1998 -
The trail of Lewis and Clark 1804-1904a story of the great exploration across the continent in 1804-6; with a description of the old trail based upon actual travel over it and of the changes found a century laterBookद्वारा Wheeler, Olin D. (Olin Dunbar), 1852-1925
प्रकाशित 1904 -
द्वारा Smith, Harlan Ingersoll, 1872-1940
प्रकाशित 1900