edited by Keith Henney
McGraw-Hill, 1959
Buku Referensi
Orr, William I., author
Howard W. Sams , 1987
Buku Referensi
Wilby, Pete, author
Routledge, 1994
Buku Referensi
Terman, Frederick E. (Frederick Emmons), author
McGraw-Hill, 1955
Buku Teks
American Radio Relay League
American Radio Relay League, 1969
Buku Referensi