Columbia subject headings:
Harvard subject headings:
Oder-Neisse Line (Germany and Poland)--Description and travel.
Ruge, E. (Elisabeth)
Ruge, Peter, 1937-
Western and Northern Territories (Poland)--Description and travel.
Princeton subject headings:
Ruge, E. (Elisabeth)
Ruge, Peter, 1937-
Western and Northern Territories (Poland)--Description and travel.