BibSlavKon: 697 hits for 13 on page 10

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
91	Zapożyczenia niemieckie w gwarach śląskich Kleszcz, Krzysztof - Z polskich studiów slawistycznych. Seria 10, Językoznawstwo : prace na XIII Międzynarodowy kongres slawistów w Lublanie 2003 (2002), 89–99
92	Refarmacyja ŭ historyi litaraturnych moŭ slavjan : uklad poľska-belaruskaha i slavenska-charvackaha pratestantyzmu : daklad na XIII Mižnarodnym z’jezdze slavistaŭ Klimaŭ, Ihar - 2003, 56 s.
93	Slavonski dijalekt prema ostalim hrvatskim dijalektima Kolenić, Ljiljana - Zbornik zagrebačke slavističke škole 2002 (2003), 175–183
94	Glasoslovni razvoj v slovenskogoriškem narečju Koletnik, Mihaela - Slavistična revija : časopis za jezikoslovje in literarne vede 51 (2003) Posebna številka, 38–50
95	Akcentolohični ta fonetyčni archajizmy odnijeji ukrajins’koji hovirky Rumuniji Kovács, Oxána - Studia slavica Academiae scientiarum Hungaricae 46 (2001) 1/2, 135–144
96	The North Slavic-Lithuanian Contact Area : Mutual Influence and Resistance Levin, Jules F. - American Contributions to the 13th International Congress of Slavists : Ljubljana, August 2003 (2003), 139–148
97	Nastanak i razvoj jugozapadnog istarskog dijalekta Lisac, Josip - Zbornik zagrebačke slavističke škole 2002 (2003), 193–197
98	Faľklornaje kajne farmiravanni slavjanskich litaraturnych moŭ Ljašuk, Viktoryja - Movaznaŭstva, litaratura, kuľturalohija, faľklarystyka : XIII Mižnarodny z’jezd slavistaŭ (Ljubljana, 2003) : daklady belaruskaj delehacyi (2003), 70–86
99	Der Genitiv des Urhebers oder des Erlebenden und Betroffenen in Verbindung mit Partizipien im Litauischen und regionalen Nord-West-Russischen Locher, Jan Peter; Roduner, Markus; Privitelli, Tobias; Weyermann, Reto; Weyermann, Reto; Weyermann, Reto; Weyermann, Reto; Weyermann, Reto - Contributions suisses au XIIIe congrès mondial des slavistes à Ljubljana, août 2003 = Schweizerische Beiträge zum XIII. Internationalen Slavistenkongress in Ljubljana, August 2003 (2003), 165–182
100	Odnosi susjednih hrvatskih i slovenskih govora Lončarić, Mijo - Zbornik zagrebačke slavističke škole 2002 (2003), 199–208

Bibliography of International Congresses of Slavists (BibSlavKon)