Columbia subject headings:
Dichlorophenoxyacetic acid--Environmental aspects.
Dichlorophenoxyacetic acid--Toxicology--Handbooks, manuals, etc.
Environmental health.
Harvard subject headings:
Dichlorophenoxyacetic acid--Environmental aspects.
Dichlorophenoxyacetic acid--Toxicology.
Princeton subject headings:
Dichlorophenoxyacetic acid--Environmental aspects.
Dichlorophenoxyacetic acid--Toxicology.