Columbia subject headings:
Mahler, Alma, 1879-1964--Bibliography.
Mahler, Gustav, 1860-1911--Bibliography.
Harvard subject headings:
Mahler, Alma, 1879-1964--Bibliography.
Mahler, Gustav, 1860-1911--Bibliography.
Princeton subject headings:
Mahler, Alma, 1879-1964--Bibliography.
Mahler, Gustav, 1860-1911--Bibliography.