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The Polish People's Republic
Morrison, James F., (1968)
Ėkonomičeskaja ėffektivnostʹ sotrudničestva SSSR s socialističeskimi stranami : (teoretičeskie i metodologičeskie problemy)
Rybakov, Oleg Konstantinovič, (1975)
The European Community and Eastern Europe
Ransom, Charles, (1973)