Columbia subject headings:
Harvard subject headings:
Aerobic bacteria--Classification--Congresses.
Aerobic bacteria--Identification--Congresses.
Sporeforming bacteria--Classification--Congresses.
Sporeforming bacteria--Identification--Congresses.
Princeton subject headings:
Aerobic bacteria--Identification--Congresses.
Bacteria--Classification--Congresses.
Sporeforming bacteria--Identification--Congresses.