It always irritates me when these sorts of sites decide to implement their own often quirky document-viewing web app and hide everything behind it instead of just providing a direct link to a PDF or similar. I mean, if you're going to have this material freely available anyway why not make it easy to access?

IMHO archive.org is a good example to follow; I know their recent redesign is somewhat controversial, but they have not changed the fact that it is easy to get to the content directly, and their URLs are also mostly descriptive.