Columbia subject headings:
Artists--Germany--Correspondence.
Menzel, Adolph, 1815-1905--Correspondence.
Harvard subject headings:
Artists--Germany--Correspondence.
Menzel, Adolph, 1815-1905--Correspondence.
Princeton subject headings:
Artists--Germany--Correspondence.
Menzel, Adolph, 1815-1905. Correspondence.
Personal correspondence.