Columbia subject headings:
Subject headings, Polyglot.
Subject headings--Agriculture--Economic aspects.
Subject headings--Sociology, Rural.
Harvard subject headings:
Agriculture--Economic aspects--Dictionaries--Polyglot.
Dictionaries, Polyglot.
Sociology, Rural--Dictionaries--Polyglot.
Subject headings, Polyglot.
Subject headings--Agriculture--Economic aspects.
Subject headings--Sociology, Rural
Princeton subject headings: