Columbia subject headings:
Harvard subject headings:
Authors, German--20th century--Correspondence
Nörrenberg, Erich.
Philologists--Germany--Correspondence.
Wibbelt, Augustin, 1862-1947--Correspondence.
Princeton subject headings:
Authors, German--20th century--Correspondence.
Nörrenberg, Erich.
Philologists--Germany--Correspondence.
Wibbelt, Augustin, 1862-1947--Correspondence.