Columbia subject headings:
Positron annihilation--Congresses.
Positrons--Scattering--Congresses.
Solids--Congresses.
Surfaces (Physics)--Congresses.
Harvard subject headings:
Princeton subject headings:
Positron beams--Congresses.
Solids--Surfaces--Effect of radiation on--Congresses.
Surfaces (Physics)--Effect of radiation on--Congresses.