Columbia subject headings:
Harvard subject headings:
Asimov, Isaac, 1920-1992--Encyclopedias.
Science fiction, American--Encyclopedias.
Princeton subject headings:
Asimov, Isaac, 1920-1992--Encyclopedias.
Asimov, Isaac, 1920-1992. Foundation series.
Chaotic behavior in systems in literature.
Encyclopedias.
Robots in literature.
Science fiction, American--Encyclopedias.