Have you used the OAISTER part of WorldCat? There was a Facebook posting about it after I wrote my original post for this week.
This is the answer to all of us who have wished for a catalog of materials that have been digitized and put online–“books and articles, audio and video files, photos, data sets, theses and research papers” to quote the WorldCat blog.
I’ve used it when it was housed at the University of Michigan, but I played with it some more and I was amazed at the breadth of what was available, including interviews and photos.
Have fun!