Columbia subject headings:
Ammann, Gustav, 1885-1955.
Freibad Letzigraben (Zurich, Switzerland)
Frisch, Max, 1911-1991.
Swimming pools--Switzerland--Zurich.
Zurich (Switzerland)--Buildings, structures, etc.
Harvard subject headings:
Ammann, Gustav, 1885-1955.
Freibad Letzigraben (Zurich, Switzerland)
Frisch, Max, 1911-1991.
Swimming pools--Switzerland--Zurich.
Zurich (Switzerland)--Buildings, structures, etc.
Princeton subject headings: