BibSlavKon: 697 hits for 13 on page 28

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
271	Iz istorijata na verbalnija komizăm v bălgarskija i srăbskija knižoven ezik prez Văzraždaneto : (Jovan Sterija Popovič i Petko Račov Slavejkov) Ivanova, Najda - Slavjanska filologija : dokladi i statii za XIII Meždunaroden kongres na slavistite (2003), 112–121
272	Nacionaľno-kuľturnaja specifika frazeologizmov v aspekte slavjano-finno-ugorskich vzaimootnošenij Jevstratova, Svetlana Borisovna - Slavjanskije jazyki : ot prošlogo k nastojaščemu : k XIII Meždunarodnomu s`jezdu slavistov (Ljubljana, 15–21.08.2003) (2003), 43–53
273	Slavjanskaja lingvističeskaja imagologija segodnja : „obrazy jazyka“ i sposoby ich soprjaženija s mentaľnosťju i kuľturoj Khairov, Shamil - 13th International Congress of Slavists [online] (2003), 14 s.
274	Sociolingvističeskije aspekty cerkovnoslavjanskogo jazyka segodnja Končarević, Ksenija - Zbornik Matice srpske za slavistiku (2003), 105–117
275	Serbskije issledovanija zaimstvovannoj leksiki v slavjanskich jazykach Kosanović, Marija-Magdalena - Slavistika (2003), 45–51
276	Mentale Dialektkarten und Dialektimages in Russland : Metasprachliches Wissen und Bewertung von Dialekten Krause, Marion; Ljublinskaja, Valentina; Sappok, Christian; Evdokimov, Aleksandr; Evdokimov, Aleksandr; Evdokimov, Aleksandr; Evdokimov, Aleksandr; Evdokimov, Aleksandr - Zeitschrift für Slawistik 48 (2003) 2, 188–211
277	Biblejskije performativy predpisanija v slovenskom jazyke Krékits, József - Studia slavica Academiae scientiarum Hungaricae 48 (2003) 1/3, 145–152
278	War and Peace : Language Planning in Ukraine Krouglov, Alexander - 13th International Congress of Slavists [online] (2003), 15 s.
279	Wortspiel und Chat-ähnliche Merkmale in Julij Daniėľs Briefen aus der Haft Kurt, Sibylle - Contributions suisses au XIIIe congrès mondial des slavistes à Ljubljana, août 2003 = Schweizerische Beiträge zum XIII. Internationalen Slavistenkongress in Ljubljana, August 2003 (2003), 119–142
280	Mentale Verben als argumentative Prädikate : Invarianten und Verwendungen am Beispiel der „Dialektika mifa“ Aleksej Losevs Kuße, Holger - Zeitschrift für Slawistik 48 (2003) 2, 230–256

Bibliography of International Congresses of Slavists (BibSlavKon)