Columbia subject headings:
Harvard subject headings:
Constance (Lake of, Region)--Antiquities.
Hegau (Germany)--Antiquities.
Thurgau (Switzerland)--Antiquities.
Princeton subject headings:
Constance, Lake, Region--Antiquities--Guidebooks.
Guidebooks.
Historic sites--Constance, Lake, Region.
Historic sites--Rhine River Valley.
Rhine River Valley--Antiquities--Guidebooks.