Columbia subject headings:
Harvard subject headings:
Astronomers--Germany--Biography
Astronomers--Hungary--Biography.
Astronomy--History--18th century.
Astronomy--History--19th century.
Zach, Franz Xaver, Freiherr von, 1754-1832.
Princeton subject headings:
Astronomers--Germany--Biography.
Zach, Franz Xaver, Freiherr von, 1754-1832.