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Economic Geology (59)
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Primary terms
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    - C-14/C-12 (1)
    - Cl-36 (1)
    - Cs-137 (3)
    - Mn-53 (1)
    - Os-187/Os-186 (1)
    - Pb-206/Pb-204 (1)
    - Pb-207/Pb-204 (1)
    - Pb-208/Pb-204 (1)
    - Pb-210 (2)
    - Ra-226 (1)
    - Sm-147/Nd-144 (1)
    - Th-230 (1)
    - Th-232/Th-230 (1)
    - tritium (5)
    - U-234 (1)
    - U-238/U-234 (1)
    - U-238/U-235 (1)
  - stable isotopes
    - Be-10/Be-9 (1)
    - C-13/C-12 (24)
    - C-14/C-12 (1)
    - Cl-37/Cl-35 (2)
    - Cr-53/Cr-52 (1)
    - Cu-65 (1)
    - D/H