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照片出處
- Jackson, William Henry. "River Hills, trough of the Potomac." Detroit Publishing Co. 1892?. Touring Turn-of-the-Century America: Photographs from the Detroit Publishing Company, 1880-1920, Library of Congress.
- Fowler, Thaddeus Mortimer. "Bird's eye view of Cumberland, Maryland 1906. By Thaddeus M. Fowler." c1906. Map Collections: 1544-1999, Library of Congress.
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