Columbia subject headings:
Algebraic topology--Congresses.
Geometry, Algebraic--Congresses.
Transformation groups--Congresses.
Harvard subject headings:
Algebraic topology--Congresses.
Geometry, Algebraic--Congresses.
Transformation groups--Congresses.
Princeton subject headings:
Algebraic topology--Congresses.
Geometry, Algebraic--Congresses.
Transformation groups--Congresses.