Columbia subject headings:
Organized crime--United States--Congresses.
Postal service--Law and legislation--United States--Criminal provisions--Congresses.
Trial practice--United States--Congresses.
Harvard subject headings:
Mail fraud--United States.
Organized crime--United States--Congresses.
Postal service--Law and legislation--United States--Criminal provisions--Congresses.
Trial practice--United States--Congresses
Princeton subject headings: