The circular, square, and octagonal earthworks of Ohio / by Cyrus Thomas.
- Thomas, Cyrus, 1825-1910.
- Date:
- 1889
Licence: Public Domain Mark
Credit: The circular, square, and octagonal earthworks of Ohio / by Cyrus Thomas. Source: Wellcome Collection.
Licence: Public Domain Mark
Credit: The circular, square, and octagonal earthworks of Ohio / by Cyrus Thomas. Source: Wellcome Collection.