Strontium--90 deposition on the earth's surface, 1958-1961.
D018534:Earth, Planet; D011847:Radioactive Fallout; D013324:Strontium; D013325:Strontium Isotopes
D011847:Radioactive Fallout; D013325:Strontium Isotopes; D013324:Strontium
RADIOACTIVE FALLOUT; STRONTIUM ISOTOPES