Here's one more journal article - you should be able to get to it from a university library (and remember that the general public has a right to use state college libraries), or by interlibrary loan through your local library:

Journal of Contemporary History; Jan95, Vol. 30 Issue 1, p37, 27p: Biddiscombe, Perry, "`The enemy of our enemy': A view of the Edelweiss Piraten from the British and American archives."

Also, this website seems like a good starting place for web browsing, and there is also a Wikipedia article on the subject with other links.