Columbia subject headings:
Harvard subject headings:
Engels, Friedrich, 1820-1895--Literary art.
Marx, Karl, 1818-1883--Literary art.
Princeton subject headings:
Engels, Friedrich, 1820-1895--Humor, satire, etc.
Engels, Friedrich, 1820-1895--Language.
Marx, Karl, 1818-1883--Humor, satire, etc.
Marx, Karl, 1818-1883--Language.