Columbia subject headings:
Hydronymy.
Names, Geographical--Europe, Eastern.
Names, Geographical--Poland.
Names, Geographical--Slavic.
Slavic languages--Etymology--Names.
Harvard subject headings:
Hydronymy
Names, Geographical--Europe, Eastern
Names, Geographical--Poland
Names, Geographical--Slavic
Slavic languages--Etymology--Names.
Princeton subject headings:
Hydronymy.
Names, Geographical--Poland.
Slavic languages--Etymology--Names.