Columbia subject headings:
Socialism--Abstracts--Periodicals.
Socialism--Europe--Abstracts--Periodicals.
Socialist parties--Abstracts--Periodicals.
Socialist parties--Europe--Abstracts--Periodicals.
Harvard subject headings:
Socialism--Abstracts--Periodicals.
Socialism--Europe--Abstracts--Periodicals.
Socialist parties--Abstracts--Periodicals.
Socialist parties--Europe--Abstracts--Periodicals.
Princeton subject headings:
Democracy--Periodicals.
Periodicals.
Socialism--Periodicals.