The XB-25F was another conversion of an existing B-25C for anti-icing
research. It differed from the XB-25E in having electrical rather
than hot-air deicing elements. I have no further details.
B-25 Mitchell: The Magnificent Medium, N. L. Avery, Phalanx, 1992.
Medium with the Mostest--The B-25 Mitchell, Jerry Scutts,
Air International, Vol. 44, Nos 2 and 3, 1993.
Famous Bombers of the Second World War, William Green, Doubleday,
United States Military Aircraft Since 1909, Gordon Swanborough
and Peter M. Bowers, Smithsonian, 1989.
North American B-25A-G Mitchell, Aircraft in Profile, Doubleday,
Jane's American Fighting Aircraft of the 20th Century, Michael J.