Columbia subject headings:
Apprentices--Europe--History.
Europe--History--1492-
Wages--Apprentices--Europe--History.
Harvard subject headings:
Apprentices--Europe--History.
Europe--History--1492-
Wages--Apprentices--Europe--History.
Princeton subject headings:
Apprentices--Europe--History.
Europe--History--1492-
Wages--Apprentices--Europe--History.