Surface Air Sampling Program-80th Meridian Network. January-December 1967.
D000398:Air Pollution, Radioactive / Q000032:analysis*; D002104:Cadmium / Q000032:analysis; D002564:Cerium Isotopes / Q000032:analysis; D007503:Iron Isotopes / Q000032:analysis; D009656:North America; D011005:Plutonium / Q000032:analysis; D011868:Radioisotopes / Q000032:analysis; D012621:Seasons; D013020:South America; D013325:Strontium Isotopes / Q000032:analysis; D015040:Zirconium / Q000032:analysis
D002564:Cerium Isotopes; D007503:Iron Isotopes; D011868:Radioisotopes; D013325:Strontium Isotopes; D002104:Cadmium; D011005:Plutonium; D015040:Zirconium