Columbia subject headings:
Apartment houses--Germany--Hamburg--Design and construction.
Hamburg (Germany)--Buildings, structures, etc.
Hamm (Hamburg, Germany)--Buildings, structures, etc.
Housing policy--Germany--Hamburg.
Working class--Dwellings--Germany--Hamburg.
Harvard subject headings:
Apartment houses--Germany--Hamburg--Design and construction.
Housing policy--Germany--Hamburg.
Working class--Dwellings--Germany--Hamburg.
Princeton subject headings: