Columbia subject headings:
Labor supply--Europe--Statistics--Periodicals.
Labor supply--Japan--Statistics--Periodicals.
Labor supply--North America--Statistics--Periodicals.
Labor supply--Statistics--Periodicals.
Harvard subject headings:
Labor supply--Europe--Statistics.
Labor supply--Japan--Statistics.
Labor supply--North America--Statistics.
Princeton subject headings:
Labor supply--Europe--Statistics--Periodicals.
Labor supply--Japan--Statistics--Periodicals.
Labor supply--North America--Statistics--Periodicals.
Labor--Statistics--Periodicals.
Periodicals.
Statistics.