Columbia subject headings:
Harvard subject headings:
Astrophysics--Congresses
Gamma ray bursts--Congresses.
Supernovae--Congresses
Princeton subject headings:
Active galactic nuclei--Congresses.
Astrophysics--Congresses.
Double stars--Congresses.
Gamma ray bursts--Congresses.
Neutron stars--Congresses.
Supernovae--Congresses.