title: TRENDS OF STRONTIUM-90 LEVELS IN SURFACE WATERS OF THE UNITED STATES, 1959--1963.
mesh_terms: D011834:Radiation Monitoring; D013324:Strontium; D013325:Strontium Isotopes; D013326:Strontium Radioisotopes; D014481:United States; D014867:Water; D014876:Water Pollution
chemical_list: D013325:Strontium Isotopes; D013326:Strontium Radioisotopes; D014867:Water; D013324:Strontium
keywords: RADIATION MONITORING; STRONTIUM ISOTOPES; UNITED STATES; WATER POLLUTION