Hi.
I would highly recommend to read Ann Dresselhaus writings on German Shepherds early history. Says she: "The original German Shepherd studbook, Zuchtbuch fur Deutsche Schaferhunde, shows several pure wolves were used to create the breed.
Link to this reading: http
//www.grapevvine.net-wolf2dog/gsd.1.htm.
Or you can read Kate McMahons writings on "The Myth and Controversy Surrounding the Alsatian Wolf Dog" at:
http://pages.infinit.net/paww/alsa.html
Øyvind