Columbia subject headings:
Ambart︠s︡umi︠a︡n, V. A. (Viktor Amazaspovich)
Galaxies--Congresses.
Stars--Congresses.
Harvard subject headings:
Princeton subject headings:
Ambart︠s︡umi︠a︡n, V. A. (Viktor Amazaspovich)
Galaxies--Congresses.
Stars--Congresses.