Harmon, James V.; Fiedler, Ltc David M; Lam, Ltc Ret John R. (Spring 1994). "Automated HF Communications"(PDF). Army Communicator: 22–26. Archived from the original(PDF) on 23 December 2016. Retrieved 24 December 2018.
Harmon, James V.; Fiedler, Ltc David M; Lam, Ltc Ret John R. (Spring 1994). "Automated HF Communications"(PDF). Army Communicator: 22–26. Archived from the original(PDF) on 23 December 2016. Retrieved 24 December 2018.