Columbia subject headings:
Toll roads--Delaware.
Toll roads--Pennsylvania.
Wilmington and Great Valley Turnpike Company.
Harvard subject headings:
Law--Delaware.
Toll roads--Delaware.
Toll roads--Law and legislation--Delaware.
Toll roads--Pennsylvania.
Wilmington and Great Valley Turnpike Road.
Princeton subject headings:
Toll roads--Delaware.
Toll roads--Pennsylvania.
Wilmington and Great Valley Turnpike Company.