Index for 1aPA

• 1aPA1. Nonlinear surface wave propagation in a piezoelectric material.
• 1aPA2. Second harmonic generation in a sound beam transmitted through an isotropic solid.
• 1aPA3. Comparative measurement of second-harmonic generation in various materials.
• 1aPA4. Observations of nonlinearity with slow dynamics in rocks.
• 1aPA5. Modeling nonlinearity and slow dynamics for rock in resonance experiments.
• 1aPA6. Theory and feasibility of breather solitons in sandstone.