Columbia subject headings:
Foerster, Josef Bohuslav, 1859-1951.
Wagner, Cosima, 1837-1930.
Harvard subject headings:
Foerster, Josef Bohuslav, 1859-1951
Wagner, Cosima, 1837-1930.
Princeton subject headings:
Foerster, Josef Bohuslav, 1859-1951.
Wagner, Cosima, 1837-1930.