The single YB-47J was a standard B-47E modified to carry and evaluate
the new MA-2 radar bombing-navigation system that had been designed for the
American Combat Planes, Third Enlarged Edition, Ray Wagner, Doubleday,
Post World War II Bombers, Marcelle Size Knaack, Office of Air Force
The Boeing B-47, Peter Bowers, Aircraft in Profile, Doubleday, 1968.
Boeing Aircraft Since 1916, Peter M. Bowers, Naval Institute Press,
United States Military Aircraft Since 1909, Gordon Swanborough and
Peter M. Bowers, Smithsonian, 1989.
Boeing B-47 Stratojet--Variant Briefing. Bill Yenne, International Air Power Review, Vol 6, 2002.