Perry, J. W. (1950). Scientific Russian: A textbook for classes and self-study. Interscience Publishers.
Chicago-viite (17. p.)Perry, James Whitney. Scientific Russian: A Textbook for Classes and Self-study. New York: Interscience Publishers, 1950.
MLA-viite (9. p.)Perry, James Whitney. Scientific Russian: A Textbook for Classes and Self-study. Interscience Publishers, 1950.
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