BibSlavKon: 697 hits for 13 on page 31

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 Volume 13 provides 697 hits
301	A Multicultural, Multiethnic, and Multiconfessional Bosnia and Herzegovina : Myth and Reality Simmons, Cynthia - Nationalities Papers 30 (2002) 4, 623–638
302	K voprosu o funkcionirovanii slavjanskich jazykov v integrirujuščejsja Jevrope Stanković, Bogoljub - Zbornik Matice srpske za slavistiku (2003), 255–262
303	Zur Typologie der sprachlichen Vitalität slavischer Minderheiten Steinke, Klaus - Funktionale Beschreibung slavischer Sprachen : Beiträge zum XIII. Internationalen Slavistenkongress in Ljubljana (2003), 199–211
304	Kolonialsprache Russisch Stern, Dieter - Die slawischen Sprachen im aktuellen Funktionieren und historischen Kontakt : Beiträge zum XIII. Internationalen Slawistenkongress vom 15. bis 21. August 2003 in Ljubljana (2003), 69–97
305	Dijakronijski aspekti normiranja hrvatskoga jezika Tafra, Branka - Zbornik zagrebačke slavističke škole 2002 (2003), 305–319
306	Movna sytuacija ta movna polityka v sučasnij Ukrajini : (na zahaľnoslov´jans’komu tli) Taranenko, Oleksandr - Movoznavstvo : naukovo-teoretyčnyj žurnal Instytutu movoznavstva im. O.O. Potebni ta Ukrajins’koho movno-informacijnoho fondu NAN Ukrajiny (2003) 2/3, 30– 55
307	Puristic Attitudes to German Phraseological and Syntactic Calques in the Slavic Languages of the Former Habsburg Empire Thomas, George - Canadian Slavonic Papers : an Interdisciplinary Journal Devoted to Central and Eastern Europe 45 (2003) 1/2, 201–225
308	Le serbo-croate (bosniaque, croate, monténégrin, serbe) : de ľétude d’une langue à ľidentité des langues Thomas, Paul-Louis - Revue des études slaves 74 (2002–2003) 2/3, 311–325
309	Sociolinhvistyčna klasyfikacija mov u jiji slov´jans’kij specifici j dynamici Tkačenko, Orest - Revue des études slaves 74 (2002–2003) 2/3, 3–13
310	Språk och identitet i Vitryssland. En studie i den vitryska nationalismens historia Törnquist-Plewa, Barbara - 1997, 109 s.

Bibliography of International Congresses of Slavists (BibSlavKon)