Columbia subject headings:
Architecture--Rhine River Valley--History--20th century.
City planning--Rhine River Valley--History--20th century.
Urban renewal--Rhine River Valley--History--20th century.
Harvard subject headings:
Architecture--Rhine River Valley--History--20th century.
City planning--Rhine River Valley--History--20th century.
Urban renewal--Rhine River Valley--History--20th century.
Princeton subject headings:
Architecture--Rhine River Valley--History--20th century.
City planning--Rhine River Valley--History--20th century.
Urban renewal--Rhine River Valley--History--20th century.