Columbia subject headings:
Harvard subject headings:
Dominik, Hans, 1872-1945--Criticism and interpretation.
Junkers, Hugo, 1859-1935--Influence.
Science fiction, German--20th century--History and criticism.
Princeton subject headings:
Dominik, Hans, 1872-1945--Criticism and interpretation.
Junkers, Hugo, 1859-1935--Influence.
Science fiction, German--20th century--History and criticism.