title: Some remarks on secondary protective barrier calculation for radiographic installations: NCRP Report No. 49 revisited.
authors.affiliation: Servizio di Fisica Sanitaria, Arcispedale S. Maria Nuova, Reggio Emilia, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Borasi
authors.forename: P P
authors.initials: PP
authors.lastname: Ferretti
mesh_terms: D008433:Mathematics; D011835:Radiation Protection / Q000379:methods*; D011859:Radiography / Q000295:instrumentation*