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