Links:
[1] http://www.norcalaprs.net/
[2] http://www.nccra.us
[3] http://www.k6ef.net
[4] http://www.ki6esh.com/blog/
[5] http://www.ocs.net
[6] http://www.n6nu.org
[7] http://www.radiohound.com
[8] http://webpages.charter.net/n4wyk/thd7.htm
[9] http://www.wa3hrl.com/link7/index.html
[10] http://www.qsl.net/ve7yjh/tkd7.html
[11] http://fastolfe.net/ham/thd7.html
[12] http://www4.plala.or.jp/nomrax/hammaps.htm
[13] http://www.narcconline.org/
[14] http://del.icio.us/superdave913/hamradio