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Vsemirnoe chozjajstvo: tendencii, sdvigi, protivorečija
Šmelev, Nikolaj Petrovič, (1987)
East West trade and indebtedness of the individual CMEA countries up to 1990
Askanas, Benedykt, (1980)
The prospects for East-West trade : policies, indebtedness, exports
Franklin, Daniel E., (1983)