Lewis, M., Clark, W., & Rees, T. (1815). Travels to the source of the Missouri river and across the American continent to the Pacific ocean: Performed by order of the government of the United States, in the years 1804, 1805, and 1806 (A new ed.). London: Longman, Hurst, Rees, Orme, and Brown.

Lewis, Meriwether, William Clark, and Thomas Rees. Travels to the Source of the Missouri River and Across the American Continent to the Pacific Ocean: Performed By Order of the Government of the United States, in the Years 1804, 1805, and 1806. A new ed. London: Longman, Hurst, Rees, Orme, and Brown, 1815.

Lewis, Meriwether, William Clark, and Thomas Rees. Travels to the Source of the Missouri River and Across the American Continent to the Pacific Ocean: Performed By Order of the Government of the United States, in the Years 1804, 1805, and 1806. A new ed. London: Longman, Hurst, Rees, Orme, and Brown, 1815.