Columbia subject headings:
Executive privilege (Government information)--United States.
Official secrets--United States.
Security classification (Government documents)--United States.
United States--Politics and government--1981-1989.
Harvard subject headings:
Executive privilege (Government information)--United States
Official secrets--United States.
Security classification (Government documents)--United States.
United States--Politics and government--1981-1989.
Princeton subject headings:
Executive privilege (Government information)--United States.
Official secrets--United States.
Security classification (Government documents)--United States.
United States--Politics and government--1981-.