Columbia subject headings:
Lead poisoning.
Lead--Toxicology.
Nephritis, Interstitial--Etiology.
Occupational diseases.
Harvard subject headings:
Lead--Toxicology
Nephritis, Interstitial--Etiology.
Occupational diseases.
Princeton subject headings:
Lead--Toxicology.
Nephritis, Interstitial--Etiology.
Occupational diseases.