Columbia subject headings:
Health risk assessment--United States--Handbooks, manuals, etc.
Physicians--United States--Handbooks, manuals, etc.
Toxicity testing--United States--Handbooks, manuals, etc.
Harvard subject headings:
Health risk assessment--United States--Handbooks, manuals, etc.
Physicians--United States--Handbooks, manuals, etc.
Toxicity testing--United States--Handbooks, manuals, etc.
Princeton subject headings: