Columbia subject headings:
Sea-power--Congresses.
Twenty-first century--Forecasts--Congresses.
United States. Navy--Congresses.
Harvard subject headings:
Sea-power--Congresses.
Twenty-first century--Forecasts--Congresses
United States. Navy--Congresses.
Princeton subject headings:
Sea-power--Congresses.
Twenty-first century--Forecasts--Congresses.
United States. Navy--Congresses.