found: NUCMC data from Columbia Univ. Libraries, Bakhmeteff Archive (New York, N.Y.) for Steinberg, I.N. Papers, ca. 1918-1925(collection includes essays written by left socialist revolutionaries on a variety of topics, among them a work entitled Partii gosudarstvennogo kapitalizma i levonarodnichestvo by I︠A︡kov Braun)
found: Stranit︠s︡y sovetskoĭ literaturnoĭ kritiki 20-kh godov, 1992:t.p. (I︠A︡. Braun) p. 111, etc. (real name, Izrailʹ Veniaminovich Broun; I︠A︡kov Braun, pseudonym; b. March 20, 1894 (acc. to recollections of family); 1889 (acc.to documents); d. 1937; ... I︠A︡kova Veniaminovicha Brauna; Soviet literary critic who died in purges)
notfound: Bol. sov. ėnt︠s︡ikl.