Society for Czechoslovak Philately (SCP) www.csphilately.net

Rhodesian Study Circle (RSC) rhodesianstudycircle.org.uk

Military Postal History Society (MPHS) militaryphs.org

Auxiliary Markings Club (AMC) postal-markings.org

Pacific NW Postal History Society (PNWPHS) pacificnorthwestpostalhistorysociety.org

Future PIPEX shows and Convening Societies