Columbia subject headings:
Asimov, Isaac, 1920-1992--Authorship.
Science fiction--Authorship.
Science fiction--History and criticism.
Harvard subject headings:
Asimov, Isaac, 1920-1992
Science fiction--Authorship
Science fiction--History and criticism
Princeton subject headings:
Asimov, Isaac, 1920---Authorship.
Science fiction--Authorship.
Science fiction--History and criticism.