Columbia subject headings:
Agriculture--Defense measures--United States.
Bioterrorism--United States--Prevention.
Food industry and trade--Defense measures--United States.
Harvard subject headings:
Agriculture--Defense measures--United States.
Bioterrorism--United States--Prevention
Food industry and trade--Defense measures--United States.
Princeton subject headings:
Agriculture--Defense measures--United States.
Bioterrorism--United States--Prevention.
Food industry and trade--Defense measures--United States.