title: A routine method for the determination of low caesium-137 activities in biological samples.
mesh_terms: D000818:Animals; D002587:Cesium Isotopes / Q000032:analysis*; D006168:Guinea Pigs; D008722:Methods; D011834:Radiation Monitoring; D011847:Radioactive Fallout / Q000032:analysis*
chemical_list: D002587:Cesium Isotopes; D011847:Radioactive Fallout