Grubbs, Jim, author
Master Publishing, 1988
Buku Teks
Kasser, Joe, author
Tab Books, 1984
Buku Teks
Artikel Jurnal
American Radio Relay League
American Radio Relay League, 1969
Buku Referensi
American Radio Relay League
The American Radio Relay League, Inc., 1962
Buku Referensi