Columbia subject headings:
Harvard subject headings:
Gramberg, Gerhard Anton, 1746-1818--Correspondence.
Nicolai, Friedrich, 1733-1811
Nicolai, Friedrich, 1733-1811--Correspondence.
Princeton subject headings:
Authors, German--19th century--Correspondence.
Gramberg, Gerhard Anton, 1746-1818--Correspondence.
Nicolai, Friedrich, 1733-1811--Correspondence.
Physicians--Germany--Correspondence.