Columbia subject headings:
Language and languages--Philosophy--History.
Philosophy, Medieval.
Scholasticism--History.
Semiotics--History.
Speculative grammar--History.
Harvard subject headings:
Language and languages--Philosophy--History
Scholasticism.
Semiotics--History.
Speculative grammar.
Princeton subject headings:
Language and languages--Philosophy--History.
Scholasticism--History.
Semiotics--History.
Speculative grammar--History.