Industrial radiology: X-rays and gamma rays / by Ancel St. John and Herbert R. Isenburger. St. John, Ancel, 1882- Isenburger, Herbert Rudolf, 1900- Radiography, Industrial. QC481 .S3 1943 537.5 JOI Includes index. Bibliography: p. 233-289. London : Chapman and Hall ; New York : Wiley, c1943. c1943. 1943 Text iv, 298 p. : eng