Table of Contents

1. Introduction; 2. The quantum mechanical method; 3. Angular momentum; 4. The theory of radiation; 5. One-electron spectra; 6. The central-field approximation; 7. The Russell-Saunders case: energy levels; 8. The Russell-Saunders case: eigenfunctions; 9. The Russell-Saunders case: line strengths; 10. Coupling; 11. Intermediate coupling; 12. Transformations in the theory of complex spectra; 13. Configurations containing almost closed shells. X-rays; 14. Central fields; 15. Configuration interaction; 16. The Zeeman effect; 17. The Stark effect; 18. The nucleus in atomic spectra; Appendix. Universal constants and natural atomic units.