BibSlavKon: 341 hits for B1547 on page 15

The Bibliography of International Congresses of Slavists (1929-2018) was converted from thirteen printed volumes into a database in cooperation with the Slavonic Library in Prague (Slovanská knihovna Praha) and contains 8550 records. Since 2008 the Bibliography appear only in electronic form and will be updated in five-year interval according to the next Congresses of Slavists. The further information can be found here. The overview of the classification can be found: here.

Your search for B1547 provides 341 hits
141	Problema nacionaľnogo charaktera v russkoj i bolgarskoj literaturach 60-ch gg. XIX v. Krasnov, G. V. - 1963, 45 s.
142	Roljata na cerkovnoslavjanskija ezik za izgraždaneto na săvremennija bălgarski knižoven ezik Andrejčin, Lj. - Bălgarski ezik : organ na Instituta za bǎlgarski ezik pri Bǎlgarskata akademija na naukite 8 (1958) 4/5, 309-320
143	Načalo i razvoj na kritičeskija realizăm v bălgarskata literatura Caney, G. - Slavističen sbornik : po slučaj IV meždunaroden kongres na slavistite v Moskve (1958), 89-169
144	Problema genezisa socialističeskogo realizma v bolgarskoj literature Markov, D. F. - 1958, 54 s.
145	Problema genezisa socialističeskogo realizma v bolgarskoj literature Markov, D. F. - Issledovanija po slavjanskomu literaturovedeniju i stilistike (1960), 338-375
146	Obšti osobenosti na bălgarskite i srăbskite chajduški pesni Romanska-Vranska, C. - Slavističen sbornik : po slučaj IV meždunaroden kongres na slavistite v Moskve (1958), 379-407
147	Un parler de ľAlbanie méridionale et le bulgaro-macédonien commun Mazon, A. - Księga referatów : II Międzynarodowy zjazd slawistów (filologów słowiańskich). Sekcja I – Językoznawstwo = Recueil des communications : II Congrès international des slavistes (philologues slaves). Section I – Linguistique (1934), 73
148	La langue bulgare et la transition politique ou la langue en transition 1989–2013 Armianov, Gueorgui - Revue des études slaves 84 (2013) 1/2, 25–41
149	Tipologija na optativnite konstrukcii v bălgarskija, ruskija i polskija ezik Čakărova, Krasimira - Slavjanska filologija : dokladi za XV Meždunaroden kongres na slavistite v Minsk, Belarus, 2013 (2013), 88–98
150	Zakonomernosti formirovanija nacionaľnoj specifiki bolgarskoj frazeologii Georgieva, Stefka - Nationales und Internationales in der slawischen Phraseologie = Nacional'noje i internacionaľnoje v slavjanskoj frazeologii : XV Meždunarodnyj s"jezd slavistov 20–27 avgusta 2013 g. Minsk, Belarusʼ (2013), 36–39

Bibliography of International Congresses of Slavists (BibSlavKon)