Columbia subject headings:
Authors, German--19th century--Correspondence.
Fontane, Theodor, 1819-1898--Correspondence.
Merkel family--Correspondence.
Harvard subject headings:
Authors, German--19th century--Correspondence
Fontane, Theodor, 1819-1898--Correspondence.
Merkel family--Correspondence.
Princeton subject headings:
Authors, German--19th century--Correspondence.
Fontane family.
Fontane, Theodor, 1819-1898--Correspondence.
Merkel family.