Columbia subject headings:
Crime--United States.
Hoover, J. Edgar (John Edgar), 1895-1972.
United States Bureau of Investigation.
Harvard subject headings:
Crime--United States
Criminals--United States
Hoover, J. Edgar (John Edgar), 1895-1972
United States Bureau of Investigation
Princeton subject headings:
Crime and criminals--United States.
Hoover, John Edgar, 1895-
U. S. Dept. of justice. Bureau of investigation.