CONTENTS[br] 1. Introduction 909[br] 2. Domain Structure and Magnetic Hysteresis. General Concepts . . . . . 910[br] 3. Materials for Permanent Magnets 912[br] 4. Magnetically Hard Single Crystals and Rare-Earth Permanent Magnets. . 918[br] 5. Temperature Stability of Magnetic Properties of Rare-Earth[br] Permanent Magnets. 922[br] 6. High-Coercivity Precipitation-Hardened Alloys of REM with 3d Metals . . 925[br] 7. High-Anisotropy, Magnetically Multiaxial, Compounds, Based on[br] REM, for Permanent Magnets 927[br] 8. Compounds of REM with 3d Metals with Ultrahigh Magnetic Energy at[br] Low Temperatures 928[br] 9. Conclusion 929[br] References 930[br]