Columbia subject headings:
Astronomers--Germany--Biography.
Schmidt, Arno, 1914-1979.
Schröter, Johann Hieronymus, 1745-1816.
Harvard subject headings:
Astronomers--Germany--Biography
Schmidt, Arno, 1914-1979.
Schröter, Johann Hieronymus, 1745-1816.
Princeton subject headings:
Astronomy--Germany--History.
Schmidt, Arno, 1914-1979.
Schröter, Johann Hieronymus, 1745-1816.