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1by Denisov, P. K. (Pavel Konstantinovich)
Published 1958Moskva : Izd-vo Akademii nauk SSSR, 1958.76 p. : ill. ; 20 cm.“...Nauchno-popul︠i︡arna︠i︡a seri︠i︡a / Akademi︠i︡a nauk SSSR....”
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2by Vinter, A. V. (Aleksandr Vasilʹevich), 1878-1958
Published 1950Moskva : Izd-vo Akademii nauk SSSR, 1950.34 p. ; 20 cm.“...Nauchno-popul︠i︡arna︠i︡a seri︠i︡a / Akademi︠i︡a nauk SSSR....”