Columbia subject headings:
Harvard subject headings:
Espionage--United States--Prevention.
Intelligence service--United States.
National security--United States
Nuclear energy--Research--Laboratories--Security measures--United States.
Nuclear weapons information--United States.
United States. Department of Energy--Security measures.
Princeton subject headings:
Espionage--United States--Prevention.
Intelligence service--United States.
National security--United States.
Nuclear energy--Research--Laboratories--Security measures--United States.
Nuclear weapons information--United States.
United States. Department of Energy--Security measures.