Columbia subject headings:
Anthrax--Effectiveness--United States.
Anthrax--Vaccination--United States.
Biological warfare--Government policy--United States.
Harvard subject headings:
Anthrax--Effectiveness--United States.
Anthrax--Vaccination--United States.
Biological warfare--Government policy--United States.
Princeton subject headings:
Anthrax--Effectiveness--United States.
Anthrax--Vaccination--United States.
Biological warfare--Government policy--United States.