Columbia subject headings:
Authors, German--20th century--Correspondence.
Domin, Hilde--Correspondence.
Palm, Erwin Walter, 1910-1988--Correspondence.
Harvard subject headings:
Authors, German--20th century--Correspondence
Domin, Hilde--Correspondence.
Palm, Erwin Walter, 1910-1988--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Domin, Hilde--Correspondence.
Palm, Erwin Walter, 1910-1988--Correspondence.