title: Natural 226Ra and 228Th in thyroids of cattle from Nigeria, W. Africa..
mesh_terms: D000818:Animals; D001345:Autoradiography; D002417:Cattle; D066298:In Vitro Techniques; D009549:Nigeria; D011883:Radium / Q000032:analysis*; D013910:Thorium / Q000032:analysis*; D013961:Thyroid Gland / Q000032:analysis*
chemical_list: D013910:Thorium; D011883:Radium