Columbia subject headings:
Harvard subject headings:
Bremen (Germany)--Biography.
Communists--Germany--Biography
Engels, Friedrich, 1820-1895
Engels, Friedrich, 1820-1895--Childhood and youth.
Engels, Friedrich, 1820-1895--Correspondence.
Engels, Friedrich, 1820-1895--Homes and haunts--Germany--Bremen.
Princeton subject headings:
Communists--Germany--Biography.
Engels, Friedrich, 1820-1895--Childhood and youth.
Engels, Friedrich, 1820-1895--Correspondence.
Engels, Friedrich, 1820-1895.