Columbia subject headings:
Archaebacteria--Biotechnology--Congresses.
Archaebacteria--Congresses.
Archaebacteria--Metabolism--Congresses.
Archaebacteria--Molecular aspects--Congresses.
Harvard subject headings:
Archaebacteria--Biotechnology--Congresses.
Archaebacteria--Congresses.
Archaebacteria--Metabolism--Congresses.
Archaebacteria--Molecular aspects--Congresses.
Princeton subject headings:
Archaebacteria--Congresses.