Columbia subject headings:
Security clearances--United States.
United States. Defense Security Service--Evaluation.
United States. Office of Personnel Management. Federal Investigative Services Division--Evaluation.
Harvard subject headings:
Security clearances--United States.
United States. Defense Security Service--Evaluation.
United States. Office of Personnel Management. Federal Investigative Services Division--Evaluation.
Princeton subject headings:
Security clearances--United States.
United States. Defense Security Service--Evaluation.
United States. Office of Personnel Management. Federal Investigative Services Division--Evaluation.