Columbia subject headings:
Harvard subject headings:
France. Armée. Régiment d'infanterie, 102e--Biography.
Soldiers--France--Correspondence
World War, 1914-1918--France
Princeton subject headings:
Ballay, André, 1874-1942.
France. Armée. Régiment d'infanterie, 102e--Biography.
Soldiers--France--Correspondence.
World War, 1914-1918--France.