Columbia subject headings:
Cosmochemistry--Congresses.
H II regions (Astrophysics)--Congresses.
Stars--Formation--Congresses.
Harvard subject headings:
Cosmochemistry--Congresses.
H II regions (Astrophysics)--Congresses.
Stars--Formation--Congresses
Princeton subject headings:
Cosmochemistry--Congresses.
H II regions (Astrophysics)--Congresses.
Stars--Formation--Congresses.