Columbia subject headings:
Harvard subject headings:
Invertebrates--Ecology--Congresses.
Invertebrates--Physiology--Congresses
Microbial ecology--Congresses
Microorganisms--Physiology--Congresses
Princeton subject headings:
Invertebrates--Ecology--Congresses.
Invertebrates--Physiology--Congresses.
Microbial ecology--Congresses.
Microorganisms--Physiology--Congresses.