Columbia subject headings:
Class consciousness--Europe--History.
Education--Social aspects--Europe--History.
Middle class--Europe--History.
Socialism--Europe--History.
Harvard subject headings:
Class consciousness--Europe--History.
Education--Social aspects--Europe--History.
Middle class--Europe--History.
Socialism--Europe
Socialism--Europe--History
Princeton subject headings:
Class consciousness--Europe--History.
Education--Social aspects--Europe--History.
Middle class--Europe--History.
Socialism--Europe--History.