This extensive tutorial provides a thorough foundation for the understanding of piezoelectric/crystal resonators properties and behaviors. The table of contents provides insight into just how comprehensive this tutorial is:
1. Applications and Requirements
2. Quartz Crystal Oscillators
3. Quartz Crystal Resonators
4. Oscillator Stability
5. Quartz Material Properties
6. Atomic Frequency Standards
7. Oscillator Comparison and Specification
8. Time and Timekeeping
9. Related Devices and Applications
Tutorials page from the IEEE Ultrasonics, Ferroelectrics and Frequency Control society website. The page lists several free tutorials that are available to download on topics such as low noise oscillators, phase noise, and crystal resonators.