Columbia subject headings:
Canals--Delaware.
Canals--Maryland.
Canals--Pennsylvania.
Chesapeake and Delaware Canal Company.
Harvard subject headings:
Canal companies--United States.
Canals--Delaware
Canals--Law and legislation--Delaware.
Canals--Law and legislation--Maryland.
Canals--Law and legislation--Pennsylvania.
Canals--Maryland
Canals--Pennsylvania
Chesapeake and Delaware Canal (Del. and Md.)
Chesapeake and Delaware Canal Company
Princeton subject headings:
Canals--Delaware.
Canals--Maryland.
Canals--Pennsylvania.
Chesapeake and Delaware Canal Company.