Columbia subject headings:
Communication and traffic--Europe--History--17th century.
Communication and traffic--Europe--History--18th century.
Europe--Intellectual life--17th century.
Europe--Intellectual life--18th century.
Transportation--Europe--History--17th century.
Transportation--Europe--History--18th century.
Harvard subject headings:
Culture diffusion--Europe--History--17th century.
Culture diffusion--Europe--History--18th century.
Europe--Foreign relations--History--17th century.
Europe--Foreign relations--History--18th century.
Transportation--Europe--History--17th century.
Transportation--Europe--History--18th century.
Princeton subject headings:
Culture diffusion--Europe--History--17th century.
Culture diffusion--Europe--History--18th century.
Europe--Foreign relations--History--17th century.
Europe--Foreign relations--History--18th century.
Transportation--Europe--History--17th century.
Transportation--Europe--History--18th century.