RT Journal Article SR Electronic T1 NCRP REPORT NO. 49: STRUCTURAL SHIELDING DESIGN AND EVALUATION FOR MEDICAL USE OF X-RAYS AND GAMMA RAYS OF ENERGIES UP TO 10 MeV JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 107 OP 107 VO 5 IS 2 A1 Steidley, K. David YR 1977 UL http://tech.snmjournals.org/content/5/2/107.abstract AB