Columbia subject headings:
Harvard subject headings:
Demuth, Helena, 1820-1890
Engels, Friedrich, 1820-1895--Relations with women.
Germany--Biography.
Marx, Karl, 1818-1883--Relations with women.
Women household employees--Germany--Biography.
Women--Germany--Social conditions.
Princeton subject headings:
Demuth, Helena, 1820-1890.
Engels, Friedrich, 1820-1895--Relations with women.
Germany--Biography.
Marx, Karl, 1818-1883--Relations with women.
Women household employees--Germany--Biography.
Women--Germany--Social conditions.