Columbia subject headings:
Brooklyn Union Gas Company--History.
Gas companies--New York (State)--New York--History.
Gas industry--New York (State)--New York--History.
Harvard subject headings:
Brooklyn Union Gas Company--History.
Princeton subject headings:
Brooklyn Union Gas Company--History.
Gas companies--New York (State)--New York--History.
Gas industry--New York (State)--New York--History.