Columbia subject headings:
Mathematics, Greek--Congresses.
Mathematics--Philosophy--Congresses.
Proclus, approximately 410-485. Commentarium in Euclidem--Congresses.
Harvard subject headings:
Euclid. Elements. Book 1--Congresses.
Geometry--Congresses
Mathematics, Greek--Congresses.
Proclus, approximately 410-485. Eis prōton Eukleidou stoicheiōn biblon--Congresses.
Princeton subject headings: