Columbia subject headings:
Carbon--Congresses.
Nitrogen--Congresses.
Nuclear astrophysics--Congresses.
Oxygen--Congresses.
Stars--Structure--Congresses.
Harvard subject headings:
Carbon--Congresses
Carbon--Isotopes--Congresses.
Nitrogen--Congresses.
Nitrogen--Isotopes--Congresses.
Nuclear astrophysics--Congresses.
Oxygen--Congresses
Oxygen--Isotopes--Congresses.
Stars--Structure--Congresses.
Princeton subject headings:
Carbon--Congresses.
Cosmochemistry--Congresses.
Nitrogen--Congresses.
Nuclear astrophysics--Congresses.
Oxygen--Congresses.