Columbia subject headings:
Harvard subject headings:
Caravans, Romani--Germany--Frankfurt am Main--History--20th century.
Romanies--Germany--Frankfurt am Main--History--20th century.
Trailer camps--Germany--Frankfurt am Main--History--20th century.
Trailer camps--Government policy--Germany--Frankfurt am Main--History--20th century.
Wohngemeinschaft Bonameser Strasse--History--20th century.
Princeton subject headings:
Alternative lifestyles--Germany--Frankfurt am Main.
Circus performers--Germany--Frankfurt am Main.
Frankfurt am Main (Germany)--Social conditions--21st century.