Newton, D Attenuation of 13-20 keV photons in tissue substitutes and their validity for calibration purposes in the assessment of plutonium in lungs. [electronic resource] - Health physics Nov 1978 - 699-703 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0017-9078 Subjects--Topical Terms: Body BurdenElementary ParticlesHumansLung--analysisModels, StructuralPlutonium--analysisRadiometry--standardsX-Rays