Columbia subject headings:
Harvard subject headings:
Income--Venezuela, Central North--Statistics--Periodicals.
Labor supply--Venezuela, Central North--Statistics--Periodicals.
Unemployed--Venezuela, Central North--Statistics--Periodicals.
Venezuela, Central North--Population--Statistics--Periodicals.
Princeton subject headings:
Income--Venezuela--Statistics--Periodicals.
Labor supply--Venezuela--Statistics--Periodicals.
Unemployed--Venezuela--Statistics--Periodicals.
Venezuela--Population--Statistics--Periodicals.