Columbia subject headings:
George, Stefan, 1868-1933.
Glöckner, Ernst, 1885-1934.
Harvard subject headings:
George, Stefan, 1868-1933.
Glöckner, Ernst, 1885-1934.
Princeton subject headings:
George, Stefan, 1868-1933.
Glöckner, Ernst, 1885-1934.