Columbia subject headings:
European communities--Bibliography--Periodicals.
European communities--Research--Periodicals.
European federation--Bibliography--Periodicals.
European federation--Research--Periodicals.
Harvard subject headings:
European communities--Bibliography--Periodicals.
European communities--Research--Periodicals.
European federation--Bibliography--Periodicals.
European federation--Research--Periodicals.
Princeton subject headings:
European communities--Bibliography--Periodicals.
European communities--Research--Periodicals.
European federation--Bibliography--Periodicals.
European federation--Research--Periodicals.
Periodicals.