Columbia subject headings:
Engels, Friedrich, 1820-1895.
Law and socialism.
Marx, Karl, 1818-1883.
Harvard subject headings:
Engels, Friedrich, 1820-1895
Law and socialism
Marx, Karl, 1818-1883
Princeton subject headings:
Engels, Friedrich, 1820-1895.
Law and socialism.
Marx, Karl, 1818-1883.