Columbia subject headings:
Slums--New York (State)--New York.
Tenement houses--New York (State)--New York.
Working class--Dwellings--New York (State)--New York.
Harvard subject headings:
Slums--New York (State)--New York.
Tenement houses--New York (State)--New York
Working class--New York (State)--New York--Dwellings.
Princeton subject headings: