The SDI newsletter is a quarterly publication emailed to members of SDI.  In it are hundreds of pages and dozens of articles written by SDI friends and affiliates from around the world.  On the left hand side of this page simply click on "Newsletter".  There you will find the most recent newsletter as well as all of the previous back issues.  Searching for a specific article?  Use the site search at the top right of the page.  Thank you!