Panov, Mikhail Viktorovich, author
Prosveshhenie, 1982
Buku Referensi
Melioranskij, P.M., author
Tip. imperatorskoj akademìi nauk, 2011
Buku Teks
Myuller, V.K., author
Sovetskaja-Entsiklopedija, 1969
Buku Referensi
Mironova, S.A., author
Gosudarstvennoe izdatel'stvo inostrannyx i natsional'nyx slovarej, 1958
Buku Referensi
Vyatyutnev, Mark Nikolayevich, author
Pedagogika, 1973
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