Columbia subject headings:
Extrachromosomal DNA--Congresses.
Gene expression--Congresses.
Microbial genetics--Congresses.
Plasmids--Congresses.
Symbiosis--Congresses.
Harvard subject headings:
Extrachromosomal DNA--Congresses.
Gene expression--Congresses.
Microbial genetics--Congresses.
Plasmids--Congresses.
Symbiosis--Congresses
Princeton subject headings:
Extrachromosomal DNA--Congresses.
Gene expression--Congresses.
Microbial genetics--Congresses.
Plasmids--Congresses.
Symbiosis--Congresses.