Columbia subject headings:
Astrophysics--Periodicals.
Chemistry, Physical and theoretical--Periodicals.
Cosmic physics--Periodicals.
Physics--Periodicals.
Harvard subject headings:
Astrophysics--Periodicals
Chemistry, Physical and theoretical--Periodicals.
Cosmic physics--Periodicals.
Physics--Periodicals
Princeton subject headings:
Astrophysics--Periodicals.
Chemistry, Physical and theoretical--Periodicals.
Cosmic physics--Periodicals.
Periodicals.
Physics--Periodicals.