Columbia subject headings:
Anti-infective agents--Congresses.
Biological products--Preservation--Congresses.
Drugs--Preservation--Congresses.
Vaccines--Preservation--Congresses.
Harvard subject headings:
Anti-infective agents--Congresses
Biological products--Preservation--Congresses.
Drugs--Preservation--Congresses.
Vaccines--Preservation--Congresses.
Princeton subject headings: