BibSlavKon: 18 hits for P1500 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 P1500 provides 18 hits
1	Arenge srpskih povelja Mošin, Vladimir - Odgovori na pitanja – Saopštenja i referati : Dopune : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Réponses aux questions – Communications et rapports : Supplément : IIIème congrès international des slavistes (philologues slaves) (1939), 104
2	Hrvatskoglagoljska legenda o sv. Pavlu Pustinjaku Badurina Stipcević, Vesna - Croatica : prinosi proučavanju hrvatske književnosti (1992/1993), 51-59
3	Movni osoblyvosti „Krechivs’koji Paleji“ Lev, Vasyľ - Odgovori na pitanja – Saopštenja i referati : Dopune : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Réponses aux questions – Communications et rapports : Supplément : IIIème congrès international des slavistes (philologues slaves) (1939), 66-69
4	Izučenije idej Pavla Florenskogo v Švecii Danilova, Irina L. - 2013, 1–6
5	K rekonstrukcii struktury praslavjanskogo leksiko-semantičeskogo polja Jakuškina, Jekaterina I. - Slavjanskoje jazykoznanije : XIV Meždunarodnyj s“jezd slavistov Ochrid, 10–16 sentjabrja 2008 g. : doklady rossijskoj delegacii (2008), 554–575
6	Stanovlenije belorusskogo literaturnogo polja v XIX v. kak process „emansipacii“ Chaustowicz, Mikołaj - Belorusskaja literatura kak modeľ razvitija „malych“ (slavjanskich) literatur : materialy k tematičeskomu bloku na XV Meždunarodnom s“jezde slavistov : (Minsk, 20–27.08.2013 g.) (2013), 115–130
7	Literatura popularna w II polowie XIX i na początku XX wieku: dzieła, gatunki i kody Szocki, Józef - Z polskich studiów slawistycznych. Seria 9, Literaturoznawstwo, folklorystyka, nauka o kulturze : prace na XII Międzynarodowy kongres slawistów w Krakowie 1998 (1998), 39-43
8	Prínos Pavla Jozefa Šafárika k štúdiu slovanskej mytológie Horváthová, Emília - Slavica slovaca 28 (1993) 1/2, 62-69
9	Apokrifiot tekst „Videnieto na apostol Pavle“ vo južnoslovenskite literaturi Antiḱ, Vera - Referati na makedonskite slavisti za VIII meģunaroden slavistički kongres vo Zagreb – Ljubljana (1978), 97-104
10	Recepcja romantyzmu rumuńskiego w Polsce drugiej połowy XIX wieku Petrică, I. - Rapports (1973)

Bibliography of International Congresses of Slavists (BibSlavKon)