AAPE - American Association of Philatelic Exhibitors A worldwide organization of stamp collectors that exhibit their collections competitively and work together for the betterment of philatelic exhibiting and judging standards.
Groszy Overprints Site dedicated to the groszy overprints of 1950. It utilizes the exhibit material of Polonus member George Zelwinder to identify and illustrate the different overprints used during the currency devaluation. See George's exhibit in the "Exhibits" section of the Polonus website.
Solidarity Issues Site is dedicated to the issues of the Polish Solidarity movement.
Sports Philatelists International (SPI) Sports Philatelists International (SPI) serves the needs of both novice and experienced Olympic and sport stamp collectors throughout the world.
Stamp Domain An comprehensive philatelic site providing data on stamps of the world including an excellent section pertaining to the Stamps of Poland
Stamp Encyclopedia of Poland An extremely comprehensive listing of all the areas of Polish philately including regular issues, local issues, P.O.W issues and Labels. Virtually all issues items are described this comprehensive vast wealth of information. Text is in English