Grettler, D. J., Bachman, D. C., Custer, J. F., & Jamison, J. (1991). Phase I and II archaeological survey of Kent Road 88 (Dover to Leipsic Road) and Kent Road 337 (Persimmon Tree Lane) realignments, and final archaeological excavations at the W. Eager site for the Delaware Route 1 -- relief corridor, Dover, Kent County, Delaware. [Dover, Del.]: Division of Highways.

Grettler, David J., David C. Bachman, Jay F. Custer, and JoAnn Jamison. Phase I and II Archaeological Survey of Kent Road 88 (Dover to Leipsic Road) and Kent Road 337 (Persimmon Tree Lane) Realignments, and Final Archaeological Excavations At the W. Eager Site for the Delaware Route 1 -- Relief Corridor, Dover, Kent County, Delaware. [Dover, Del.]: Division of Highways, 1991.

Grettler, David J., David C. Bachman, Jay F. Custer, and JoAnn Jamison. Phase I and II Archaeological Survey of Kent Road 88 (Dover to Leipsic Road) and Kent Road 337 (Persimmon Tree Lane) Realignments, and Final Archaeological Excavations At the W. Eager Site for the Delaware Route 1 -- Relief Corridor, Dover, Kent County, Delaware. [Dover, Del.]: Division of Highways, 1991.