Columbia subject headings:
Harvard subject headings:
Alster River (Germany)
Alster River (Germany)--Navigation.
Hamburg (Germany)--Description and travel.
Inland water transportation--Germany--Alster River.
Rivers--Germany--Hamburg.
Princeton subject headings:
Alster River (Germany)--Navigation--History.
Canals--Germany--Hamburg--History.
City planning--Germany--Hamburg--History.
Hamburg (Germany)--Buildings, structures, etc.
Urban policy--Germany--Hamburg--History.