Columbia subject headings:
John XXI, Pope, -1277. Summulae logicales--Congresses.
Logic, Medieval--Congresses.
Logic, Modern--16th century--Congresses.
Logic--Spain--History--Congresses.
Semantics (Philosophy)--History--Congresses.
Harvard subject headings:
John XXI, Pope, -1277. Summulae logicales--Congresses.
Logic, Medieval--Congresses.
Logic, Modern--16th century--Congresses.
Logic--Spain--History--Congresses.
Semantics (Philosophy)--History--Congresses.
Princeton subject headings:
Logic, Medieval--Congresses.
Logic, Modern--16th century--Congresses.
Logic--Spain--Congresses.