Ramamurthi, M Addendum to "On improving the validity of wire screen 'unattached' fraction Rn daughter measurements". [electronic resource] - Health physics Sep 1990 - 355-6 p. digital Publication Type: Comment; Letter ISSN: 0017-9078 Subjects--Topical Terms: Bismuth--analysisLead--analysisPolonium--analysisRadiometry--instrumentationRadon Daughters