title: The use of ferrous sulphate for dosimetry by post.
mesh_terms: D003036:Cobalt Isotopes; D004583:Electrons; D007501:Iron; D010969:Plastics; D011177:Postal Service; D011874:Radiometry; D011882:Radiotherapy, High-Energy; D013431:Sulfates
chemical_list: D003036:Cobalt Isotopes; D010969:Plastics; D013431:Sulfates; D007501:Iron