Columbia subject headings:
Water--Microbiology--Congresses.
Waterborne infection--Congresses.
Zoonoses--Congresses.
Harvard subject headings:
Water--Microbiology--Congresses.
Waterborne infection--Congresses.
Zoonoses--Congresses.
Princeton subject headings:
Water--Microbiology--Congresses.
Waterborne infection--Congresses.
Zoonoses--Congresses.