Use Worldcat.org - it's a great resource.

I'm not sure if this is appropriate for the Legacy Users Group but here goes. If you locate a citation from a book that you don't have access to, look it up on Worldcat.  Find a library that has the book and email the librarian there requesting scanned copies.  I did that twice recently and both librarians scanned the images and sent them to me at no charge. I did send a small donation to those libraries. Good luck!