Bulletin XIII (2011) 
Here we do offer our Bulletin in EPUB format, which has been developed for the special requirements of portable devices. If you can not open the file – this may occur when using a PC or (rarely) a Mac –, you should install a special e-book software.
Adobe Digital Editions
Adobe offers a free software that serves the needs of all different appliers. Adobe Digital Editions is available for downloading here: http://www.adobe.com/solutions/ebook/digital-editions/download.html
Adobe Digital Editions currently works with Microsoft Windows 10, 8, and 7, with Microsoft Windows Vista, Microsoft Windows XP as well as with Mac OS X 10.6 and higher.
You can also use Readium to view ePUB files. Readium is an add-on that can be installed in the Google Chrome web browser. For more information: http://readium.org/
Please note, that you must have installed Google Chrome before you can use Readium. The instructions are based on a Windows 7 PC but the steps should be similar for most systems. The software works with Microsoft Window, Mac OS X, and Linux.
If a »zip«-file appears during the download via Internet Explorer instead of an »epub«-file, choose »Save as« and replace the file extension »zip« with »epub«. Afterwards the revised file will be detected immediately.