Columbia subject headings:
Authorship--History--18th century.
Europe--Civilization--18th century.
European literature--18th century--History and criticism.
Philosophy, European--18th century.
Science--Europe--History--18th century.
Harvard subject headings:
Authorship--History--18th century.
Europe--Civilization--18th century.
European literature--18th century--History and criticism.
Philosophy, European--18th century.
Science--Europe--History--18th century
Princeton subject headings:
Authorship--History--18th century.
Europe--Civilization--18th century.
European literature--18th century--History and criticism.
Philosophy, European--18th century.
Science--Europe--History--18th century.