Columbia subject headings:
Labor--Europe--History--Periodicals.
Study Group on European Labor and Working Class History--Periodicals.
Working class--Europe--History--Periodicals.
Harvard subject headings:
Labor--Europe--History--Periodicals.
Study Group on European Labor and Working Class History--Periodicals.
Working class--Europe--History--Periodicals.
Princeton subject headings:
Labor--Europe--History--Periodicals.
Periodicals.
Study Group on European Labor and Working Class History--Periodicals.
Working class--Europe--History--Periodicals.