Columbia subject headings:
Harvard subject headings:
Black holes (Astronomy)--Congresses
Cosmology--Mathematical models--Congresses.
Gravity waves--Congresses.
Relativity (Physics)--Congresses
Princeton subject headings:
Black holes (Astronomy)x Congresses.
Cosmology--Mathematical models--Congresses.
Gravity waves--Congresses.
Relativity (Physics)--Mathematical models--Congresses.