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Keywords: Soviet calendar 1931 pocket.jpg ru Soviet calendar for 1931 showing 360 days of the Gregorian year by excluding five national holidays so that the five-day work week can be displayed as five rows http //mkkkk narod ru/Fr313 htm ИЗ ИСТОРИИ ОТЕЧЕСТВЕ ОГО КАР А ОГО КАЛЕ ДАРЯ by Дмит ий алявин Calendar stories from reforms in the USSR by Dmitry Malyavin anonymous 1930 PD-Russia PD-1996 Russia Wallet calendars Calendars of the Soviet Union 1931 |