Myuller, V.K., author
Sovetskaja-Entsiklopedija, 1969
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compiled by O.S. Akhmanova ... [and others]
Foreign and National, 1959
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Grigor`yev, Viktor Petrovich , author
Nauka, 1965
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Ozhegov, S.I., author
AZ, 1993
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Shanskij, N.M., author
Izdatelstva Moskovkogo Univesiteta, 1975
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