After acquiring the Aland Preserve the Polar Regions and Glaciers issue I realize I now have all of the officially recognized stamp issues from this series. I’ve compiled a list with images of each stamp issue and placed it here. This last one gives me a total of 37 countries. India was suppose to issue a commemorative earlier this year as well but apparently it has been delayed until December 19th of 2009. Other countries that were suppose to produce stamps for this series were Mexico, Paraguay and Uruguay but I’ve not been able to find any information about these.