Columbia subject headings:
Vacuum ultraviolet spectroscopy--Congresses.
X-ray optics--Congresses.
Harvard subject headings:
Absorption spectra--Congresses.
Energy levels (Quantum mechanics)--Congresses.
Inner-shell ionization--Congresses.
Photoionization--Congresses
Vacuum ultraviolet spectroscopy--Congresses.
X-ray spectroscopy--Congresses
Princeton subject headings:
Vacuum ultraviolet spectroscopy--Congresses.
X-ray optics--Congresses.