"Title :   The First Allied Airborne Army in Operation Varsity: Applying the Lessons of Arnhem."
Map composed by a United States Army War College student, as part of his Master's thesis, in the public domain as a work of a member of the US Government. Further source information can be found here.
From this image on En-Wikipedia.  Image was origional was from here.
"Abbatiello, John J." and then J.smith