Columbia subject headings:
Lasswitz, Kurd, 1848-1910--Criticism and interpretation.
May, Karl, 1842-1912--Criticism and interpretation.
Schmidt, Arno, 1914-1979--Criticism and interpretation.
Science fiction, German--History and criticism.
Harvard subject headings:
Lasswitz, Kurd, 1848-1910--Criticism and interpretation.
May, Karl, 1842-1912--Criticism and interpretation.
Schmidt, Arno, 1914-1979--Criticism and interpretation.
Science fiction, German--History and criticism.
Princeton subject headings:
German literature--19th century--History and criticism.
German literature--20th century--History and criticism.
Lasswitz, Kurd, 1848-1910--Criticism and interpretation.
May, Karl, 1842-1912--Criticism and interpretation.
Schmidt, Arno, 1914-1979--Criticism and interpretation.