Columbia subject headings:
Geological time--Congresses.
Geology, Stratigraphic--Congresses.
Holmes, Arthur, 1890-1965.
Radioactive dating--Congresses.
Harvard subject headings:
Geological time
Geological time--Congresses.
Geology, Stratigraphic--Congresses
Holmes, Arthur, 1890-1965.
Radioactive dating
Radioactive dating--Congresses.
Princeton subject headings:
Geological time--Congresses.
Geology, Stratigraphic--Congresses.
Holmes, Arthur, 1890-1965.
Radioactive dating--Congresses.