Columbia subject headings:
Arts, Modern--19th century--Chronology.
Impressionism (Art)--Chronology.
World politics--1900-1918--Chronology.
World politics--19th century--Chronology.
Harvard subject headings:
Arts, Modern--19th century--Chronology.
Impressionism (Art)--Chronology.
World politics--1900-1918--Chronology.
World politics--19th century--Chronology.
Princeton subject headings:
Arts, Modern--19th century--Chronology.
Impressionism (Art)--Chronology.
World politics--1900-1918--Chronology.
World politics--19th century--Chronology.