BibSlavKon: 11 hits for P1566 on page 1

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 P1566 provides 11 hits
1	War and Peace : Language Planning in Ukraine Krouglov, Alexander - 13th International Congress of Slavists [online] (2003), 15 s.
2	Itogi archeologičeskogo izučenija vostočnoslavjanskich plemen Tret'jakov, P. N. - 1958, 35 s.
3	Itogi archeologičeskogo izučenija vostočnoslavjanskich plemen Tret'jakov, P. N. - Issledovanija po slavjanskomu jazykoznaniju (1961), 306-334
4	O palomničestve v Svjatuju Zemlju v russkoj literature konca XIX i XX vv. Revelli, Giorgetta - Contributi italiani al XIII Congresso internazionale degli slavisti : (Ljubljana 15–21 agosto 2003) (2003), 541–572
5	Zapadnoslavjanskije plemena i narody v istočnikach epochi Ottonov X-go i načala XI-go vv. Donnert, Erich - Zeitschrift für Slawistik 32 (1987) 6, 892-896
6	Dialektno-plemennaja differenciacija slavjan v načale srednevekov’ja po dannym archeologii Sedov, Valentin Vasiľjevič - Istorija, kuľtura, etnografija i foľklor slavjanskich narodov : X Meždunarodnyj s“jezd slavistov : Sofija, sentjabr’ 1988 g. : doklady sovetskoj delegacii (1988), 169-180
7	Obrazovanije glavnych češskich narečij v svjazi s istorijej drevnich češsko-serbskich plemen Grigor'jev, A. - Saopštenja i referati : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Communications et rapports : IIIème congrès international des slavistes (philologues slaves) (1939), 26-28
8	Ukrajins’ko-pivdennoslov`jans’ki leksyčni paraleli jak džerelo rekonstrukciji rann’oji istoriji slov`jans’kych plemen Pivtorak, Hryhorij - Slov`jans’ki obriji (2008), 503–521
9	Problemy etno- i hlotohenezu kryvyčiv ta novhorodsʼkych sloveniv u konteksti rannʼoji istoriji slov`jansʼkych plemen Pivtorak, Hryhorij - Slov`jans’ki obriji (2013), 59–75
10	Njakoi momenti ot razselvaneto na slavjanskite plemena ot iztočnija djal na južnite slavjani i ustanovjaneto im na Balkanskija poluostrov Cankova-Petkova, G. - Slavjanska filologija (1973), 33-42

Bibliography of International Congresses of Slavists (BibSlavKon)