Columbia subject headings:
National security--Law and legislation--United States--History--20th century.
United States--Defenses--Law and legislation.
United States--Military policy--Decision making.
Harvard subject headings:
National security--Law and legislation--United States--History--20th century.
United States--Defenses--Law and legislation--History--20th century.
United States. National Security Act of 1947.
Princeton subject headings:
National security--United States--History--20th century.
United States--Defenses--Law and legislation.
United States--Military policy--Decision making.