BibSlavKon: 74 hits for P1580 on page 7

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 P1580 provides 74 hits
61	Literaturno-obščestvennyje i naučnyje svjazi Rossii i Poľši konca XVII - serediny XVIII v. Moisejeva, G. N. - Istorija, kuľtura, etnografija i foľklor slavjanskich narodov (1973), 438-451
62	„Training for Brightness“ in Hanna Kralľs Sublokatorka : Polish and Jewish Identities in Post-War Poland Armstrong, Todd Patrick - American Contributions to the 14th International Congress of Slavists : Ohrid, September 2008 (2008), 25–39
63	Mesijanstvo jak rannja stadija rozvytku filosofiji nacionaľnoji ideji : (Poľša, Ukrajina, Rosija) Zabužko, Oksana - Istorija i kuľtura slov’jan : XI Mižnarodnyj z’jizd slavistiv : Bratyslava, 30 serpnja - 8 veresnja 1993 r. (1993), 70-80
64	Musicality in Russian and Polish Verse : Feťs Trochaic Tetrameter and Related Problems of Syllabotonic Versification Klenin, Emily - American Contributions to the Tenth International Congress of Slavists : Sofia, September 1988 : Literature (1988), 219-239
65	Ahuľnyja rysy i rehijanaľnyja asablivasci materyjaľnaj i duchovnaj kuľtury naseľnictva Belaruska-Ukrainskaha Palessja Bandarčyk, Vasiľ - 1988, 26 s.
66	Poets are not Aphasics : some Notes on Roman Jakobson’s Concept of the Metaphoric and Metonymic Poles of Language Weststeijn, W. G. - Dutch Contributions to the Ninth International Congress of Slavists, Kiev, September 6-14, 1983 : Literature (1983), 125-146
67	La place du macédonien dans une typologie syntaxique des langues slaves : expression des relations actancielles et de la thématisation Creissels, Denis - Revue des études slaves (1978) 1/2, 61-64
68	Osobennosti foľklornogo processa v polose etničeskoj granicy : (na materialach russkogo foľklora XX v. Latgalii) Makašina, Taťjana Sergejevna - Istorija, kuľtura, etnografija i foľklor slavjanskich narodov : VIII meždunarodnyj s“jezd slavistov : Zagreb – Ljubljana, sentjabr’ 1978 g. : doklady sovetskoj delegacii (1978), 451-464
69	On the Influence of the English Language on Russian and Polish, and English Interference in the two Languages as Spoken on this Continent Grabowska, Y. - Canadian Contributions to the Seventh International Congress of Slavists : Warsaw, August 21-27, 1973 (1973), 185-202
70	The Polish and Czech Struggles for Silesia and their Impact on the Unity and Consciousness of the Slavic World in the Years 1918-1921 Wynot, E. J. Jr. - American Contributions to the Seventh International Congress of Slavists : Warsaw, August 21-27, 1973 (1973), 189-195

Bibliography of International Congresses of Slavists (BibSlavKon)