BAHAMAS STAMP AND POSTAL HISTORY
CANADIAN POSTAL STATIONERY STUDY GROUP  (Canada)
CONNECTICUT POSTAL HISTORY SOCIETY   (USA)
CZECH POSTAL HISTORY 
FORCES POSTAL HISTORY SOCIETY
FRENCH POSTAL HISTORY
MISSOURI POSTAL HISTORY SOCIETY (USA)
THE MILITARY POSTAL HISTORY SOCIETY  (USA)
NEW GUINEA AND PAPUA POSTAL HISTORY
OHIO POSTAL HISTORY SOCIETY (USA)
PACIFIC NORTHWEST POSTAL HISTORY SOCIETY  (USA)
POSTAL HISTORY.ORG
POSTAL HISTORY RESOURCES (NZ)
RUSSIAN POSTAL HISTORY
TEXAS POSTAL HISTORY SOCIETY (USA)