Columbia subject headings:
Industries--New Jersey--Trenton--History.
Trenton (N.J.)--Economic conditions.
Working class--New Jersey--Trenton--History.
Harvard subject headings:
Industries--New Jersey--Trenton--History.
Trenton (N.J.)--Economic conditions.
Working class--New Jersey--Trenton--History.
Princeton subject headings:
Industries--New Jersey--Trenton--History.
Trenton (N.J.)--Economic conditions.
Working class--New Jersey--Trenton--History.