Columbia subject headings:
Freshwater biology--Dictionaries.
Marine biology--Dictionaries.
Russian language--Dictionaries--English.
Harvard subject headings:
Encyclopedias and dictionaries.
Freshwater biology--Dictionaries--Russian.
Freshwater biology--Dictionaries.
Marine biology--Dictionaries--Russian.
Marine biology--Dictionaries.
Russian language--Dictionaries--English.
Princeton subject headings: