Welcome to the forums!
If you want to do some digging, check out the following link, where you can find, by year various pieces of literature that went with each model.
Document Archive - Airstream
Another option, for some light reading, is to read any of several of the books that have been published about the history of Airstreams (Wanderlust
, Airstream: The history of the Land Yacht
You might also buy the DVD of back episodes of the Vintage Airstream Podcast (The VAP). You can listen to the old episodes and absorb a lot of information on your daily commute.
Or, you could narrow your questions down, and just ask them on the forums. Be specific ie., "what was the last year for a door-with-a-door?" vs "what is the best model?"