(Cross-posted to the village pump)
I'd just like to make everyone aware of this - as most of you know, US Government documents are public domain. What most of you probably don't know is that some libraries across the country are "Federal document repositories" - IE, they are storehouses for goverment documents. A Federal respository library is *THE* biggest cache of public domain information you will ever find. So if you are in need of pictures, maps, or diagrams on any topic, you can go to one and get them by the kilo. Here (http://www.gpoaccess.gov/libraries.html ) is a listing of federal repository libraries.
--Mark