Columbia subject headings:
Industrial hygiene--Congresses.
Industrial toxicology--Congresses.
Harvard subject headings:
Generative organs--Diseases--Congresses.
Occupational diseases--Congresses.
Reproduction--Congresses.
Toxicology--Congresses
Princeton subject headings:
Generative organs--Diseases--Congresses.
Occupational diseases--Congresses.
Reproduction--Congresses.
Toxicology--Congresses.