Columbia subject headings:
Geology, Structural--Congresses.
Geophysics--Congresses.
Seismology--Congresses.
Harvard subject headings:
Geology, Structural--Congresses
Geophysics--Congresses
Seismology--Congresses.
Princeton subject headings:
Geology, Structural--Congresses.
Geophysics--Congresses.
Seismology--Congresses.