Columbia subject headings:
Geochemistry--Congresses.
Geology, Stratigraphic--Archaean--Congresses.
Petrology--Congresses.
Harvard subject headings:
Continental crust--Congresses.
Geochemistry--Congresses
Geology, Stratigraphic--Archaean--Congresses.
Petrology--Congresses
Princeton subject headings:
Geochemistry--Congresses.
Geology, Stratigraphic--Archaean--Congresses.
Petrology--Congresses.