Columbia subject headings:
Atomic spectroscopy--Charts, diagrams, etc.
Energy levels (Quantum mechanics)--Charts, diagrams, etc.
Grotrian diagrams.
Harvard subject headings:
Atomic spectroscopy--Charts, diagrams, etc.
Energy levels (Quantum mechanics)--Charts, diagrams, etc.
Grotrian diagrams.
Princeton subject headings:
Atomic spectra--Charts, diagrams, etc.
Energy levels (Quantum mechanics)--Charts, diagrams, etc.
Grotrian diagrams.