Não informado. Studies on the Soviet Union. Institute for the Study of the USSR.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Studies on the Soviet Union. Munchen, Alemanha: Institute for the Study of the USSR.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Studies on the Soviet Union. Institute for the Study of the USSR.
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