Columbia subject headings:
Harvard subject headings:
Marne, 1st Battle of the, France, 1914.
Péguy, Charles, 1873-1914--Political and social views.
Péguy, Charles, 1873-1914.
Princeton subject headings:
Authors, French--20th century--Biography.
Péguy, Charles, 1873-1914--Death and burial.
World War, 1914-1918--Campaigns--France.