RT Journal Article SR Electronic T1 X-Ray Measurements and Protection. 1913—1964 JF Journal of Nuclear Medicine JO J Nucl Med FD Society of Nuclear Medicine SP 276 OP 277 VO 24 IS 3 A1 Beach, J. Lawrence YR 1983 UL http://jnm.snmjournals.org/content/24/3/276.3.abstract AB