Columbia subject headings:
Harvard subject headings:
Coasts--Germany (East)
Coasts--Poland
Geology, Stratigraphic--Quaternary--Congresses
Plains--Germany (East)
Plains--Poland
Princeton subject headings:
Coasts--Germany--Congresses.
Geology, Stratigraphic--Quaternary--Congresses.
Geology--Germany--Congresses.
Geology--Poland--Congresses.