reading (Alternative downloads: QSL: - 0 1 2 3 4 5 6 7 8 9 10. AXTAL ZIP: - 0 1 2 3 4 5 6 7 8 9 10.) External links Introduction to quartz frequency standards Distortions in Crystal Oscillators Quartz crystal resonators and oscillators Multipage summary of quartz crystals & their oscillators, filters, etc Resonators Electronic oscillators