Columbia subject headings:
Harvard subject headings:
Maritime Provinces--Relations--Northeastern States--Congresses.
Northeast boundary of the United States--Congresses.
Northeastern States--Relations--Maritime Provinces--Congresses.
Princeton subject headings:
Maritime Provinces--Relations--Northeastern States.
Northeastern States--Relations--Maritime Provinces.
Northeastern States--Relations--Quebec (Province).
Québec (Province)--Relations--Northeastern States.