Columbia subject headings:
Clay--Permeability--Congresses.
Hydrogeology--Congresses.
Radioactive waste disposal--Congresses.
Harvard subject headings:
Clay--Moisture
Clay--Permeability--Congresses.
Clay--Permeability.
Clay--Testing
Groundwater flow
Hydrogeology--Congresses.
Radioactive waste disposal--Congresses
Princeton subject headings:
Clay--Permeability--Congresses.
Hydrogeology--Congresses.
Radioactive waste disposal in the ground--Congresses.