Lewis and Clark on the Great Plains: A Natural History by Paul A. Johnsgard. Published by the University of Nebraska Press, 2003.
"The Missing Journals of Meriwether Lewis" by Gary E. Moulton. Originally published in Montana: The Magazine of Western History 35, no.3 (1985): 28-39.
"The Journals of Lewis and Clark: Almost Home" by Gary E. Moulton. Originally published in Montana: The Magazine of Western History 48, no.2 (1998): 72-79.
"Counting Cats in Zanzibar, or, Lewis and Clark Reconsidered" by James P. Ronda. From The Western Historical Quarterly. Vol. 33, no. 1.
Lewis and Clark among the Indians, Bicentennial Edition by James P. Ronda. Published by the University of Nebraska Press, 2002.
The Way to the Western Sea: Lewis and Clark across the Continent by David Lavender. Published by the University of Nebraska Press, 2001.
