Columbia subject headings:
Harvard subject headings:
Communism--History--19th century--Sources.
Engels, Friedrich, 1820-1895--Death and burial--Public opinion.
Marx, Karl, 1818-1883--Death and burial--Public opinion.
Princeton subject headings:
Communism--History--19th century--Sources.
Engels, Friedrich, 1820-1895--Death and burial--Public opinion.
Marx, Karl, 1818-1883--Death and burial--Public opinion.