Большая советская энциклопедия
On 29 October 1948, the Presidium of Supreme Council of the Russian SFSR issued a "ukase" (order) which confirmed the special status of the city. Soviet academic publications since 1954, including the Great Soviet Encyclopedia, indicated that Sevastopol, Crimean Oblast was part of the Ukrainian SSR ("Great Soviet Encyclopedia" 1976, Vol.23. pp 104).