Columbia subject headings:
Harvard subject headings:
Agriculture and state--Brazil--Paraná (State)
Agriculture--Economic aspects--Brazil--Paraná (State)
Family farms--Brazil--Paraná (State)--Management.
Princeton subject headings:
Agriculture and state--Brazil--Paraná (State).
Agriculture--Economic aspects--Brazil--Paraná (State).
Family farms--Brazil--Paraná (State)--Management.