Columbia subject headings:
Harvard subject headings:
Astronomy--Abstracts--Periodicals.
Astronomy--Bibliography--Periodicals.
Astrophysics--Abstracts--Periodicals.
Astrophysics--Bibliography--Periodicals.
Princeton subject headings:
Abstracts.
Astronomy--Abstracts--Periodicals.
Astronomy--Bibliography--Periodicals.
Astrophysics--Abstracts--Periodicals.
Astrophysics--Bibliography--Periodicals.
Periodicals.