Columbia subject headings:
Behrstock, Julian, 1916-1997.
Internal security--United States.
Security clearances--United States.
Unesco--United States.
United Nations--Officials and employees, American.
United Nations--United States.
Harvard subject headings:
Behrstock, Julian, 1916-1997
Internal security--United States
Unesco--United States.
United Nations--Officials and employees, American.
United Nations--United States.
Princeton subject headings:
Behrstock, Julian, 1916-1997.
Loyalty--security programs, 1947-.
Unesco--United States.
United Nations--Officials and employees, American.
United Nations--United States.