Pierce, George W. (October 1923), "Piezoelectric crystal resonators and crystal oscillators applied to the precision calibration of wavemeters", Proceedings of the American Academy of Arts and Sciences, 59 (4): 81–106, doi:10.2307/20026061, hdl:2027/inu.30000089308260, JSTOR20026061
espacenet.com
worldwide.espacenet.com
US 2133642, Pierce, George W., "Electrical System", published 1938-10-18
HCMOS Crystal Oscillators(PDF), Fairchild Semiconductor Corporation, May 1983, pp. 1–2, Fairchild Semiconductor Application Note 340, archived from the original(PDF) on 2013-05-02, retrieved 2007-05-30
Pierce, George W. (October 1923), "Piezoelectric crystal resonators and crystal oscillators applied to the precision calibration of wavemeters", Proceedings of the American Academy of Arts and Sciences, 59 (4): 81–106, doi:10.2307/20026061, hdl:2027/inu.30000089308260, JSTOR20026061
jstor.org
Pierce, George W. (October 1923), "Piezoelectric crystal resonators and crystal oscillators applied to the precision calibration of wavemeters", Proceedings of the American Academy of Arts and Sciences, 59 (4): 81–106, doi:10.2307/20026061, hdl:2027/inu.30000089308260, JSTOR20026061
HCMOS Crystal Oscillators(PDF), Fairchild Semiconductor Corporation, May 1983, pp. 1–2, Fairchild Semiconductor Application Note 340, archived from the original(PDF) on 2013-05-02, retrieved 2007-05-30
