Tham khảo Định_tuổi_K-Ar

  1. ↑ Alan P. Dickin. Radiogenic Isotope Geology. Cambridge University Press, Cambridge 1995, ISBN 0-521-43151-4.
  2. ↑ ENSDF Decay Data in the MIRD Format for 40K. National Nuclear Data Center. June 1993.
  3. ↑ Sylvite Mineral Data

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