Author
United States. Federal Highway Administration
3
Bachman, David C.
2
Custer, Jay F., 1955-
2
Delaware. Bureau of Archaeology and Historic Preservation
2
Delaware. Division of Highways. Location and Environmental Studies Office
2
Grettler, David J.
2
Coleman, Ellis C.
1
Delaware Bureau of Archaeology and Historical Preservation
1
Delaware Dividion of Highways Location and Environmental Studies Office
1
Jamison, JoAnn
1