Columbia subject headings:
Borchardt, Rudolf, 1877-1945--Correspondence.
Winsloe, Christa--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Borchardt, Rudolf, 1877-1945--Correspondence.
Love-letters--Germany.
Winsloe, Christa--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Borchardt, Rudolf, 1877-1945--Correspondence.
Love-letters--Germany.
Personal correspondence.
Winsloe, Christa--Correspondence.