Columbia subject headings:
Harvard subject headings:
Fechner, Gustav Theodor, 1801-1887--Diaries.
Naturalists--Germany--Diaries.
Philosophers--Germany--Diaries.
Princeton subject headings:
Diaries.
Fechner, Gustav Theodor, 1801-1887--Diaries.
Naturalists--Germany--Diaries.
Philosophers--Germany--Diaries.