- Author
- Lichty, Jean M.
- Date of Publication
- 1964
.
Lancaster, Pennsylvania: 1949.
Gilbert, Mrs. Margaret. Foster daughter of Uriah Eckert. Interview, April 4, 1964,
at her home in Gap, Pa.
Houston, R. J. "The Gap Copper Mines" in Lancaster County Historical Society.
Pennsylvania: The New Era, 1897.
Lancaster Newspaper. No Title. February 21, 1959.
Landis