Columbia subject headings:
Harvard subject headings:
Electron-ion collisions--Congresses.
Ion-atom collisions--Congresses.
Ion-ion collisions--Congresses.
Ions--Congresses.
Ions--Spectra--Congresses.
Princeton subject headings:
Electron-ion collisions--Congresses.
Ion-atom collisions--Congresses.
Ion-ion collisions--Congresses.
Ions--Congresses.