Columbia subject headings:
Reventlow, Franziska, Gräfin zu, 1871-1918--Correspondence.
Harvard subject headings:
Reventlow, Franziska, Gräfin zu, 1871-1918--Correspondence.
Princeton subject headings:
Diaries.
Reventlow, Franziska, Gräfin zu, 1871-1918--Correspondence.
Reventlow, Franziska, Gräfin zu, 1871-1918--Diaries.