Columbia subject headings:
United States--Population.
United States--Statistics, Vital.
War.
World War, 1914-1918--Casualties--Statistics.
World War, 1914-1918--Influence.
Harvard subject headings:
United States--Population.
United States--Statistics, Vital.
War
World War, 1914-1918--Casualties--Statistics
World War, 1914-1918--Casualties.
World War, 1914-1918--Influence
Princeton subject headings:
United States--Population.
United States--Statistics, Vital.
War.
World War, 1914-1918--Casualties (Statistics, etc.)
World War, 1914-1918--Influence.