Cite

The Upper Mississippi system, and the Missouri system as far as the Mandans

MLA

Lewis, Meriwether, 1774-1809. The Upper Mississippi system, and the Missouri system as far as the Mandans. Box 1 | Folder 2. undated. https://collections.library.yale.edu/catalog/2002442.

APA, 6th edition

Lewis, Meriwether, 1774-1809. (["Box 1 | Folder 2"])(undated)[The Upper Mississippi system, and the Missouri system as far as the Mandans]. https://collections.library.yale.edu/catalog/2002442.