Stratospheric fallout of strontium-89 and barium-140.
D001464:Barium; D001465:Barium Radioisotopes; D006207:Half-Life; D009689:Nuclear Warfare; D011851:Radioactivity; D013324:Strontium; D013326:Strontium Radioisotopes
D001465:Barium Radioisotopes; D013326:Strontium Radioisotopes; D001464:Barium; D013324:Strontium
ATOMIC WARFARE; BARIUM/radioactive; STRONTIUM/radioactive