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The Finnish political System
Nousiainen, Jaakko, (1971)
Politics in modern Greece
Legg, Keith R., (1969)
The Soviet system of government
Hazard, John N., (1964)
Demokratičeskaja Respublika V'etnam : osnovy gosudarstv. stroja
Budanov, Anatolij Gavrilovič, (1975)