Columbia subject headings:
Constitutional law--Germany (West)
Constitutional law--United States.
Intelligence service--Law and legislation--Germany (West)
Intelligence service--Law and legislation--United States.
Harvard subject headings:
Eavesdropping--Germany (West)
Intelligence service--Law and legislation--Germany (West)
National security--Germany (West)--Law and legislation.
Privacy, Right of--Germany (West)
Wiretapping--Germany (West)
Princeton subject headings: