BibSlavKon: 697 hits for 13 on page 5

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
41	Zagadnienie liturgii mszalnej arcybiskupa Metodego Moszyński, Leszek - Z polskich studiów slawistycznych. Seria 10, Językoznawstwo : prace na XIII Międzynarodowy kongres slawistów w Lublanie 2003 (2002), 151–160
42	Rukopis’ iz sobranija A. F. Giľferdinga Q.p.I.25 i rukopis’ Q.p.I.28 „Listki Amfilochija“ – bolgarskaja Mineja prazdničnaja, maj – ijun’ XII–XIII vv. Nečunajeva, Nataľja Aleksejevna - Slavjanskije jazyki : ot prošlogo k nastojaščemu : k XIII Meždunarodnomu s`jezdu slavistov (Ljubljana, 15–21.08.2003) (2003), 9–18
43	On Tracking Early Slavonic Vocalic Isoglosses : Methodological and Conceptual Considerations Nuorluoto, Juhani - Studia finlandensia (2003), 128–148
44	Slovinsko-slovenské lexikálne responzie ročiti – ročka – vrč : riečica – ročka – vrkoč Ondruš, Šimon - XIII. medzinárodný zjazd slavistov v Ľubľane : príspevky slovenských slavistov (2003), 11–19
45	Mirk : a Neglected Slavic Loanword in Germanic? Orr, Robert - Canadian Slavonic Papers : an Interdisciplinary Journal Devoted to Central and Eastern Europe 45 (2003) 1/2, 47–60
46	Ecclesiastes in the Church Slavonic Textualy Translation Osinkina, Lyubov - 13th International Congress of Slavists [online] (2003), 38 s.
47	N. D. Andreev’s Proto-Boreal Theory and Its Implications in Understanding the Central-East and Southeast European Ethnogenesis : Slavic, Baltic and Thracian Paliga, Sorin - Romanoslavica (2002), 93–104
48	Semantični problemi na bălgarskite cvetooznačenija ot praslavjanski i indoevropejski proizchod v konteksta na technite slavjanski săotvetstvija Račeva, Marija - Slavjanska filologija : dokladi i statii za XIII Meždunaroden kongres na slavistite (2003), 49–61
49	Morphologische Innovationen des Altkirchenslavischen Reinhart, Johannes - Wiener Slavistisches Jahrbuch (2002), 133–148
50	K chronologii vzniku iniciálního praslovanského ch- Rejzek, Jiří - Česká slavistika 2003 : české přednášky pro XIII. mezinárodní kongres slavistů, Ljubljana 15.–21.8.2003 (2003), 115–124

Bibliography of International Congresses of Slavists (BibSlavKon)