"Response by Dr. William D. Coolidge in Accepting the Duddell Medal at the Meeting of the American Physical Society, May 1, 1942". Journal of Applied Physics. 13 (8): 478–480. August 1, 1942. Bibcode:1942JAP....13..478.. doi:10.1063/1.1714898.
"The Physical Society Award of the Duddell Medal". The British Journal of Radiology. 10 (117): 676. September 1, 1937. doi:10.1259/0007-1285-10-117-676-b.
"Response by Dr. William D. Coolidge in Accepting the Duddell Medal at the Meeting of the American Physical Society, May 1, 1942". Journal of Applied Physics. 13 (8): 478–480. August 1, 1942. Bibcode:1942JAP....13..478.. doi:10.1063/1.1714898.