Author
Lewis, Meriwether, 1774-1809
37
Clark, William, 1770-1838
34
Hafen, LeRoy R. (LeRoy Reuben), 1893-1985
18
Parkman, Francis, 1823-1893
17
Quaife, Milo Milton, 1880-1959
16
Time-Life Books
15
Pike, Zebulon Montgomery, 1779-1813
13
Etulain, Richard W.
12
Irving, Washington, 1783-1859
12
Remington, Frederic, 1861-1909
12
Hafen, Ann W. (Ann Woodbury), 1893-1970
11
Duncan, Dayton
10
Hafen, Le Roy Reuben, 1893-
10
Jackson, William Henry, 1843-1942
10
Limerick, Patricia Nelson, 1951-
10
Custer, Elizabeth Bacon, 1842-1933
9
Buffalo Bill, 1846-1917
8
De Voto, Bernard, 1897-1955
8
Dick, Everett (Everett Newfon), 1898-1989
8
Frémont, John Charles, 1813-1890
8
Horan, James D. (James David), 1914-1981
8
Leonard, Zenas, 1809-1857
8
Ronda, James P., 1943-
8
Biddle, Nicholas, 1786-1844
7
Billington, Ray Allen, 1903-1981
7
Brown, Dee, 1908-2002
7
Dary, David
7
Hine, Robert V., 1921-2015
7
Jackson, Donald, 1919-1987
7
Lavender, David, 1910-2003
7
Ruxton, George Frederick, 1820-1848
7
United States. National Park Service
7
Vestal, Stanley, 1887-1957
7
American Philosophical Society
6
Brown, Dee Alexander
6
Carson, Kit, 1809-1868
6
Dale, Edward Everett, 1879-1972
6
Driggs, Howard R. (Howard Roscoe), 1873-1963
6
Gard, Wayne, 1899-1986
6
Gregg, Josiah, 1806-1850
6
Hough, Emerson, 1857-1923
6
Malone, Michael P.
6
Moulton, Gary E.
6
Roosevelt, Theodore, 1858-1919
6
United States. War Department
6
White, Richard, 1947-
6
Allen, Paul, 1775-1826
5
Ambrose, Stephen E.
5
Athearn, Robert G.
5
Baird, Spencer Fullerton, 1823-1887
5
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