Columbia subject headings:
Harvard subject headings:
Bacillus subtilis--Congresses.
Bacteria--Physiology--Congresses.
Microbial differentiation--Congresses.
Molecular biology--Congresses
Sporeforming bacteria--Congresses.
Princeton subject headings:
Bacillus subtilis--Congresses.
Bacteria--Physiology--Congresses.
Microbial differentiation--Congresses.
Molecular biology--Congresses.
Sporeforming bacteria--Congresses.