Columbia subject headings:
Canals--Poland--Vistula River Watershed.
Lakes--Poland--Vistula River Watershed.
Names, Geographical--Poland--Vistula River Watershed.
Poland--Gazetteers.
Rivers--Poland--Vistula River Watershed.
Harvard subject headings:
Canals--Poland--Vistula River Watershed.
Lakes--Poland--Vistula River Watershed.
Names, Geographical--Poland--Vistula River Watershed.
Poland--Gazetteers.
Rivers--Poland--Vistula River Watershed.
Princeton subject headings:
Canals--Poland--Vistula River Watershed.
Lakes--Poland--Vistula River Watershed.
Names, Geographical--Poland--Vistula River Watershed.
Poland--Gazetteers.
Rivers--Poland--Vistula River Watershed.