Columbia subject headings:
Ayer, A. J. (Alfred Jules), 1910-1989.
Berkeley, George, 1685-1753.
Empiricism--History.
Hobbes, Thomas, 1588-1679.
Hume, David, 1711-1776.
Locke, John, 1632-1704.
Mill, John Stuart, 1806-1873.
Russell, Bertrand, 1872-1970.
Harvard subject headings:
Ayer, A. J. (Alfred Jules), 1910-1989.
Berkeley, George, 1685-1753.
Empiricism--History.
Hobbes, Thomas, 1588-1679
Hume, David, 1711-1776
Locke, John, 1632-1704
Mill, John Stuart, 1806-1873
Philosophers--Great Britain.
Russell, Bertrand, 1872-1970
Princeton subject headings:
Empiricism.
Philosophy, British.