Columbia subject headings:
Biological warfare--United States.
Biological warfare.
Chemical warfare--United States.
Chemical warfare.
Genetic engineering industry--Military aspects--United States.
Genetic engineering industry--Military aspects.
Genetic engineering--United States.
Genetic engineering.
Harvard subject headings:
Biological warfare
Chemical warfare.
Genetic engineering industry--Military aspects.
Genetic engineering.
Princeton subject headings:
Biological warfare--United States.
Chemical warfare--United States.
Genetic engineering industry--Military aspects--United States.
Genetic engineering--United States.