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1by Shkolʹnik, M. ︠I︡A. (Mark ︠I︡Akovlevich)
Published 1957Moskva : Izd-vo Akademii nauk SSSR, 1957.290 p. ; ill. ; 21 cm.“...Nauchno-popul︠i︡arna︠i︡a seri︠i︡a / Akademi︠i︡a nauk SSSR....”
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2by Korableva, L. I. (L︠i︡udmila Ivanovna), 1912-
Published 1954Moskva : Izd-vo Akademii nauk SSSR, 1954.97 p. : ill. ; 20 cm.“...Nauchno-popul︠i︡arna︠i︡a seri︠i︡a / Akademi︠i︡a nauk SSSR, Pochvennyĭ institut im. V.V. Dokuchaeva....”