Cite

Sketch of the public surveys in Iowa and Dakota.

MLA

General, United States. Surveyor. Sketch of the Public Surveys in Iowa and Dakota. Surveyor General's Office, 1860. https://collections.library.yale.edu/catalog/15814632.

APA, 6th edition

General, U. S. S. (1860). Sketch of the public surveys in Iowa and Dakota. [Maps]. Surveyor General's Office, https://collections.library.yale.edu/catalog/15814632.