Ewbank, Henry Lee; Lawton, Sherman Paxton (1940). Projects for Radio Speech: A Manual for the Student. New York: Harper & Brothers. p. 151. https://archive.org/details/projectsforradio00ewba
Taylor, Barry N.; Thompson, Ambler, eds. (2008). International System of Units (SI) (PDF). Special Publication. Vol. 330 (2008 ed.). Gaithersburg, MD: National Institute of Standards and Technology. p. 27. Retrieved 2019-09-02. https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication330e2008.pdf
Grammer, George (January 1933). "Rationalizing the Autodyne". QST. XVII (1). West Hartford, CN: American Radio Relay, Inc.: 11. Retrieved 2019-09-02. The 7000- and 14,000-kc. grid coils are wound with No. 18 enameled wire ... http://www.rfcafe.com/references/qst/rationalizing-autodyne-january-1933-qst.htm
Guentzler, Ronald E. (April 1967). "The "Monode" Noise Generator". QST. LI (2). West Hartford, CN: American Radio Relay, Inc.: 30. Retrieved 2019-09-02. The Monode described here is usable at frequencies below 144 Mc. with slight modification. http://www.rfcafe.com/references/qst/monode-noise-generator-april-1967-qst.htm
"Kilocycle, Kilohertz, Megacycle, Megahertz". Google Ngram Viewer. 2020-07-03. https://books.google.com/ngrams/graph?content=Kilocycle%2CKilohertz%2CMegacycle%2CMegahertz&case_insensitive=on&year_start=1900&year_end=2008&corpus=15&smoothing=3&share=&direct_url=t4%3B%2CKilocycle%3B%2Cc0%3B%2Cs0%3B%3Bkilocycle%3B%2Cc0%3B%3BKilocycle%3B%2Cc0%3B%3BKILOCYCLE%3B%2Cc0%3B.t4%3B%2CKilohertz%3B%2Cc0%3B%2Cs0%3B%3Bkilohertz%3B%2Cc0%3B%3BKilohertz%3B%2Cc0%3B%3BkiloHertz%3B%2Cc0%3B%3BKILOHERTZ%3B%2Cc0%3B.t4%3B%2CMegacycle%3B%2Cc0%3B%2Cs0%3B%3Bmegacycle%3B%2Cc0%3B%3BMegacycle%3B%2Cc0%3B%3BMEGACYCLE%3B%2Cc0%3B.t4%3B%2CMegahertz%3B%2Cc0%3B%2Cs0%3B%3Bmegahertz%3B%2Cc0%3B%3BMegahertz%3B%2Cc0%3B%3BmegaHertz%3B%2Cc0%3B%3BMegaHertz%3B%2Cc0%3B%3BMEGAHERTZ%3B%2Cc0