Columbia subject headings:
Bayerische Staatsbibliothek. Moldenhauer-Archive.
Mahler, Gustav, 1860-1911--Correspondence.
Mahler, Gustav, 1860-1911--Manuscripts.
Harvard subject headings:
Bayerische Staatsbibliothek. Moldenhauer-Archive.
Mahler, Gustav, 1860-1911--Correspondence.
Mahler, Gustav, 1860-1911--Manuscripts.
Princeton subject headings:
Bayerische Staatsbibliothek--Catalogs.
Catalogs.
Composers--Austria--Correspondence.
Mahler, Gustav, 1860-1911--Correspondence.
Mahler, Gustav, 1860-1911--Manuscripts--Catalogs.