Columbia subject headings:
Poisonous plants--Canada--Identification.
Poisonous plants--Caribbean Area--Identification.
Poisonous plants--Toxicology--Handbooks, manuals, etc.
Poisonous plants--United States--Identification.
Skin--Inflammation--Handbooks, manuals, etc.
Harvard subject headings:
Poisonous plants--Canada--Identification.
Poisonous plants--Caribbean Area--Identification.
Poisonous plants--Toxicology--Handbooks, manuals, etc.
Poisonous plants--United States--Identification.
Skin--Inflammation--Handbooks, manuals, etc.
Princeton subject headings:
Poisonous plants--Canada--Identification.
Poisonous plants--Caribbean Area--Identification.
Poisonous plants--Toxicology--Handbooks, manuals, etc.
Poisonous plants--United States--Identification.
Skin--Inflammation--Handbooks, manuals, etc.