Originally shelved in the Slavic Reading Room non-reference section, transferred to SML, Map Collection, on 6 September, 2012.
On special t.p., v. 1: Bŭlgarska akademii︠a︡ na naukite. Institut za Bŭlgarski ezik. Akademii︠a︡ na naukite na Sŭvetskii︠a︡ Sui︠u︡z. Institut za slavi︠a︡novedenie; v. 2-: Bŭlgarska akademii︠a︡ na naukite. Institut za bŭlgarski ezik.
Vol. 1 edited by S. Stoĭkov and S. B. Bernshteĭn; v. 2 by S. Stoĭkov.