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Differences with elevation -- above and below the surface.
Effects of structures and variability with height within structures.
BIBLIOGRAPEY
Manual of Laboratory Procedures, Health and Safety Laboratory,
U.S. Atomic Energy Commission, Report No. NYO-4700 (1956)
Tsivoglou, E.C., Ayer, H.E., Holaday, D.A., "Occurrence of Non
Equilibrium Atmospheric Mixtures of Radon and Its Daughters",
Hucleonics, Vol. 11, No. 9, September 1953
Harris, Saul J., "Radon Levels Found In Mines In New. York State",
N.Y. State Department of Labor, Division of Industrial Hygiene
Monthly Review, Vol. 33, No. 10, October 1954
Hess, V. F., "On the Radon Content of the Atmosphere and the.
Radium Content of River Water," Terrestrial Magnetism and Atm.
Elec. 48, 203, (1943)
Meyers, J. and Hess, V. F., "Cancer Death Rates, Topography, and
Terrestrial Radiation,", N.Y. State J. Med. 52, 463 (1952)
Hess, V. F., "Radon, Thoron, and Their Decay Products in the
Atmosphere," J. Atm. and Terrestrial Physics, 3, 172 (1953)
Hultqvist, B., "Studies on Naturally Occurring Ionizing Radiation,"
_ Kgl. Svenska Vetenskapsakad. Handl. (4) 6, No. 3 (1956)
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