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Preface; 1. The linearised equations of motion; 2. Compressional waves and shear waves; 3. Surface and interface waves; 4. Wavefronts and ray paths; 5. The general initial-boundary-value problem; 6. Time-harmonic problems; 7. A line source in a half-space (the Lamb problem); 8. The Lamb problem with a harmonic source; 9. Linear visco-elasticity; References; Index.