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2. Volkova, L.V., Calculation of the Fluxes and Angular Distributions of Atmospheric High-Energy Muons at Sea Level, Preprint of FIAN SSSR, Moscow, 1969, no. 72 (in Russian).
3. Glagolev, Yu.A., Handbook of the Atmospheric Physical Parameters, Leningrad: Gidrometeoizdat, 1970 (in Russian).
4. Maeda, K., J. Atmos. Terr. Phys., 1960, vol. 19, nos. 3–4, p. 184.