Does "Ref." here mean "Reference"?
The National Security State or Doctrine, generally referrs to the ideology and institutions (CIA, Dept. of Defense) established by the National Security Act of 1947, an enduring legacy of then President Harry S. Truman, in support of his doctrine  "to support free peoples who are resisting attempted subjugation by armed minorities or by outside pressures." (Ref. Michael J. Hogan, A Cross of Iron:
Harry S. Truman and the Origins of the National Security State, 1945-1954. New York: Cambridge University Press, 1998; which "explains the transformative process that ended in the ultimate demise of the New Deal state with its emphasis on social spending and ushered in the militarist National Security State.") 
Source: Source Watch