title: Specification of units for natural uranium and natural thorium. Statement of the national council on radiation protection and measurements (NCRP).
mesh_terms: D001822:Body Burden; D006801:Humans; D008452:Maximum Allowable Concentration; D011829:Radiation Dosage; D011835:Radiation Protection; D013910:Thorium; D014501:Uranium; D014894:Weights and Measures
chemical_list: D014501:Uranium; D013910:Thorium