CLAYTON, C G Stabilization of X-ray therapy apparatus by ionization current. [electronic resource] - The British journal of radiology Nov 1949 - 669-71, illust p. digital Publication Type: Journal Article ISSN: 0007-1285 Standard No.: 10.1259/0007-1285-22-263-669 doi Subjects--Topical Terms: HumansX-Ray Therapy