Columbia subject headings:
Harvard subject headings:
Agriculture--Economic aspects--Ireland--History.
Famines--Ireland--History--19th century
Ireland--Economic conditions.
Ireland--History--Famine, 1845-1852.
Ireland--Population--History.
Princeton subject headings:
Agriculture--Economic aspects--Ireland--History.
Famines--Ireland--History--19th century.
Ireland--Economic conditions.
Ireland--Population--History.