"Paw Paw Tunnel : C&O Canal National Historical Park, Maryland."; "Chesapeake and Ohio Canal National Historical Park."; "1988"; "

Leaflet. \"Courtesy of Parks and History Association, Washington, D.C., 1988, in cooperation with the National Park Service, U. S. Department of the Interior.\"

"; ""; "P20339"; "pec"; "Chesapeake and Ohio Canal National Historical Park."; "14256"; .