MSHAA
http://mhsaa.com/
Stripes
http://www.mhsaa.com/administration/stripes/stripes.html
National Federation of State High School Association
http://www.nfhs.org/ScriptContent/Index.cfm
National Association of Sports Officials
http://www.naso.org/
Referee
http://www.referee.com/
Honigs
http://www.honigs.com/browse_depts.asp?Cat=1&Sub=1
Officating.com
http://www.officiating.com/
Umpire Resource Center
http://www.umpire.org/