Columbia subject headings:
Accretion (Astrophysics)
Disks (Astrophysics)
Stars--Clusters.
Harvard subject headings:
Accretion (Astrophysics)
Disks (Astrophysics)
Stars--Clusters
Princeton subject headings:
Accretion (Astrophysics)
Disks (Astrophysics)
Stars--Clusters.