National Council on Radiation Protection and Measurements. (1975). Natural background radiation in the United States: Recommendations of the National Council on Radiation Protection and Measurements ; issued November 15,1975. National Council on Radiation Protection and Measurements.
Chicago-Zitierstil (17. Ausg.)National Council on Radiation Protection and Measurements. Natural Background Radiation in the United States: Recommendations of the National Council on Radiation Protection and Measurements ; Issued November 15,1975. Washington, D.C: National Council on Radiation Protection and Measurements, 1975.
MLA-Zitierstil (9. Ausg.)National Council on Radiation Protection and Measurements. Natural Background Radiation in the United States: Recommendations of the National Council on Radiation Protection and Measurements ; Issued November 15,1975. National Council on Radiation Protection and Measurements, 1975.