chapter 1 Basic Facts of Nuclei -- chapter 2 Notes on the Quantum Theory of Angular Momentum -- chapter 3 Interactions in One- and Two-electron Systems -- chapter 4 Coupling Schemes of Angular Momenta -- chapter 5 Fine and Magnetic Hyperfine Structure -- chapter 6 Magnetic Dipole and Electric Quadrupole Hyperfine Structures -- chapter 7 Intensities of Electronic Transitions -- chapter 8 Hyperfine Interactions and Laser Cooling -- chapter 9 Ions in Crystals -- chapter 10 Some Aspects of Crystal Field Theory -- chapter 11 Hyperfine Interactions in Crystals: Pr3+ in Octahedral Field -- chapter 12 Magnetic Interactions in f -Electron Systems -- chapter 13 Magnetic Hyperfine Interactions in Lanthanides -- chapter 14 Electric Quadrupole Hyperfine Interactions -- chapter 15 Electric Quadrupole Hyperfine Structure in Crystals -- chapter 16 The Electric Multipole Coupling Mechanism in Crystals -- chapter 17 Electric Dipole f ←→ f Transitions -- chapter 18 Relativistic Effects -- chapter 19 Magnetic Dipole Transitions in Crystals -- chapter 20 Hyperfine-Induced Transitions -- chapter 21 Numerical Analysis of Radial Terms -- chapter 22 Luminescence of Lanthanide-Doped Materials.