B. N. Ladygin

• Istoricheskii opyt sotrudnichestva stran SEV
• Planomernostʹ sot︠s︡ialisticheskoĭ ėkonomicheskoĭ integrat︠s︡ii
• SEV
• Sotsialisticheskoe sodruzhestvo na novom etape
• Sot︠s︡ialisticheskai︠a︡ ėkonomicheskai︠a︡ integrat︠s︡ii︠a︡
• Sot︠s︡ialisticheskoe sodruzhestvo na novom ėtape
• The Socialist community at a new stage