Columbia subject headings:
Logic, Ancient.
Manuscripts, Greek (Papyri)
Medicine, Greek and Roman.
Negation (Logic)--History.
Harvard subject headings:
Logic, Ancient
Manuscripts, Greek (Papyri)
Medicine, Greek and Roman
Negation (Logic)--History.
Princeton subject headings:
Logic, Ancient.
Manuscripts, Greek (Papyri)
Medicine, Greek and Roman.