Columbia subject headings:
Agriculture--Economic aspects--Palestine--History--20th century--Statistics.
Industries--Palestine--History--20th century--Statistics.
Labor supply--Palestine--History--20th century--Statistics.
Harvard subject headings:
Agriculture--Economic aspects--Palestine--History--20th century--Statistics.
Industries--Palestine--History--20th century--Statistics.
Labor supply--Palestine--History--20th century--Statistics.
Princeton subject headings:
Agriculture--Economic aspects--Palestine.
Industries--Palestine.