Columbia subject headings:
Brisbane, Albert, 1809-1890--Correspondence.
Socialism.
Socialists--Correspondence.
Varnhagen von Ense, Karl August, 1785-1858--Correspondence.
Harvard subject headings:
Brisbane, Albert, 1809-1890--Correspondence.
Socialism.
Socialists--Correspondence.
Varnhagen von Ense, Karl August, 1785-1858--Correspondence.
Princeton subject headings:
Brisbane, Albert, 1809-1890--Correspondence.
Socialists--Correspondence.
Varnhagen von Ense, Karl August, 1785-1858--Correspondence.