Columbia subject headings:
Harvard subject headings:
Bray, John Francis, 1809-1897.
Capitalism.
Communism.
Economics.
Gray, John, 1799-1883.
Hodgskin, Thomas, 1787-1869.
Marx, Karl, 1818-1883
Marxian economics.
Thompson, William, 1775-1833.
Princeton subject headings:
Bray, John Francis, 1809-1897.
Gray, John, 1799-1883.
Hodgskin, Thomas, 1787-1869.
Marx, Karl, 1818-1883.
Socialism.
Thompson, William, 1783-1833.