title: Surface air sampling program--80th Meridian network, January-December 1968.
mesh_terms: D000398:Air Pollution, Radioactive; D002564:Cerium Isotopes / Q000032:analysis; D002587:Cesium Isotopes / Q000032:analysis; D004782:Environmental Health; D006116:Greenland; D007503:Iron Isotopes / Q000032:analysis; D011005:Plutonium / Q000032:analysis; D011834:Radiation Monitoring; D013020:South America; D013325:Strontium Isotopes / Q000032:analysis; D014481:United States; D015040:Zirconium / Q000032:analysis
chemical_list: D002564:Cerium Isotopes; D002587:Cesium Isotopes; D007503:Iron Isotopes; D013325:Strontium Isotopes; D011005:Plutonium; D015040:Zirconium