Columbia subject headings:
Harvard subject headings:
Lem, Stanisław--Criticism and interpretation.
Polish literature--20th century--History and criticism.
Polish literature--21st century--History and criticism.
Science fiction, Polish--History and criticism.
Princeton subject headings:
Fantasy literature, Polish--History and criticism.
Lem, Stanisław--Criticism and interpretation.
Polish fiction--20th century--History and criticism.
Polish fiction--21st century--History and criticism.
Science fiction, Polish--History and criticism.