[Nick Beale]

You'd find a lot of the answers in Edward Westerman's "Flak: German Anti-Aircraft Defenses, 1914–1945". University of Kansas 2001 (ISBN 0-7006-1420-6) now in soft cover as well.

Be warned however: I found this is a turgid and repetitive book (how many times per page can an author refer to "the german ground-based air defences" without driving his readers nuts?) but if you can wade through the verbal treacle, there are some useful data about guns here and there.

My other complaint (and Rabe Anton will hate me for this!) is that it's a book written by a professional historian bringing his academic technique to a field in which he doesn't have the background knowledge that a Luftwaffe/air warfare specialist would have. He dismissed the 1940 Blitzkrieg in about two sentences for example. Also, don't expect anything like an order of battle (IIRC he doesn't name a single Flak Division). All you get are total numbers of different weapons in service at particular points.