Columbia subject headings:
Bleuler, Konrad, 1912-
Geometry, Differential--Congresses.
Mathematical physics--Congresses.
Harvard subject headings:
Bleuler, Konrad, 1912-
Geometry, Differential--Congresses.
Mathematical physics--Congresses
Princeton subject headings:
Bleuler, Konrad, 1912-
Geometry, Differential--Congresses.
Mathematical physics--Congresses.