Custer, J. F. (1986). Cultural resources of the proposed Route 13 corridor: An overview prepared for the draft environmental impact statement. [Dover, Del.?]: University of Delaware, Dept. of Anthropology, Center for Archaeological Research and Delaware Dept. of Transportation, Division of Highways, Location and Environmental Studies Office.

Custer, Jay F. Cultural Resources of the Proposed Route 13 Corridor: An Overview Prepared for the Draft Environmental Impact Statement. [Dover, Del.?]: University of Delaware, Dept. of Anthropology, Center for Archaeological Research and Delaware Dept. of Transportation, Division of Highways, Location and Environmental Studies Office, 1986.

Custer, Jay F. Cultural Resources of the Proposed Route 13 Corridor: An Overview Prepared for the Draft Environmental Impact Statement. [Dover, Del.?]: University of Delaware, Dept. of Anthropology, Center for Archaeological Research and Delaware Dept. of Transportation, Division of Highways, Location and Environmental Studies Office, 1986.