title: Gross radioactivity in surface waters of the United States October 1971.
mesh_terms: D002140:California; D002564:Cerium Isotopes / Q000032:analysis; D002587:Cesium Isotopes / Q000032:analysis; D005618:Fresh Water / Q000032:analysis; D008345:Manganese / Q000032:analysis; D009556:Niobium / Q000032:analysis; D011194:Potassium Isotopes / Q000032:analysis; D011834:Radiation Monitoring; D011868:Radioisotopes / Q000032:analysis; D011883:Radium / Q000032:analysis; D012621:Seasons; D012722:Sewage; D013325:Strontium Isotopes / Q000032:analysis; D014481:United States; D014878:Water Pollution, Radioactive; D014881:Water Supply; D015040:Zirconium / Q000032:analysis
chemical_list: D002564:Cerium Isotopes; D002587:Cesium Isotopes; D011194:Potassium Isotopes; D011868:Radioisotopes; D012722:Sewage; D013325:Strontium Isotopes; D009556:Niobium; D008345:Manganese; D015040:Zirconium; D011883:Radium