As some of you may know, I am obsessed with odd items of British WWII weaponry. I am trying to learn when certain weapons were officially introduced (if they ever were) and when they were declared obsolete. The best source for such information, of course, is the List of Changes in British War Material. A few volumes of this series have been published (the ever-helpful Ian Skennerton has done some, I think), but since I am poor (want to see my tax return?) I am trying to learn if any of the 1914-1945 lists are available in pdf or any other online format. Let me know if you know, thanks.