Преобразование Удмуртской Автономной области в Удмуртскую Автономную Советскую Социалистическую Республику (УАССР) на основании Постановления Президиума Всероссийского Центрального Исполнительного Комитета.
Удмуртская Республика : энциклопедия. – Ижевск, 2008. – C. 164.
Собрание законодательных актов по административно-территориальному делению Удмуртской АССР (1920-1970 гг.). – Ижевск, 1971. – C. 7.
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