BibSlavKon: 13 hits for P1575 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 P1575 provides 13 hits
1	Die Bedeutung des Plurals bei sorbischen Flurnamen Sperber, W. - Zeitschrift für Slawistik 3 (1958) 2/4, 310-322
2	The Collective and Counted Plurals of the Slavic Nouns Stankiewicz, E. - American Contributions to the Ninth International Congress of Slavists : Kiev, September 1983 (1983), 277-292
3	Inovation in the East Slavic Non-Past : the Case of Belarusian First-Person Plural idom Flier, Michael S. - American Contributions to the 13th International Congress of Slavists : Ljubljana, August 2003 (2003), 65–77
4	La desinenza del genitivo plurale, e gli esiti di -ō nelle lingue slave Pisani, Vittore - Saopštenja i referati : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Communications et rapports : IIIème congrès international des slavistes (philologues slaves) (1939), 48
5	Constructing Canons : Ruthenian Literatures of the 17th – 18th Centuries in Plurilingual Context Brogi Bercoff, Giovanna - Contributi italiani al XV Congresso internazionale degli slavisti : (Minsk, 20–27 agosto 2013) (2013), 251–274
6	The Inflection of Serbo-Croatian Substantives and Their Genitive Plural Endings Stankiewicz, Edward - American Contributions to the Eighth International Congress of Slavists : Zagreb and Ljubljana, September 3-9, 1978 (1978), 666-682
7	Edno balkansko mnogoezičie – meždu plurilingvizma i multilingvizma : (banatskite bălgari v Sărbija) Angelova Likomanova, Iskra - Slavjanska filologija : dokladi i statii za XIV Meždunaroden kongres na slavistite (2008), 27–36
8	Observations sur le problème de ľaccentuation dans la formation du pluriel des substantifs en bulgare moderne „ (les mots à suffíxe -vo, -a-lo, -i-lo, -ce) Bernard, R. - Communications de la délégation française (1973), 61-69
9	Osservazioni sulla traduzione degli Entretiens sur la pluralité des mondes di Fontenelle fatta da A.D. Kantemir Baracchi, Mietta - Europa orientalis : Studi e Ricerche sui Paesi e le Culture delľEst Europeo & Bibliografia Italiana Corrente sulľEuropa Orientale 7 (1988), 259-283
10	Some Theories Concerning the Unification of the Endings of the Dative, Instrumental and Locative Plural of Russian Nouns Thomas, G. - Canadian Contributions to the Seventh International Congress of Slavists : Warsaw, August 21-27, 1973 (1973), 227-235

Bibliography of International Congresses of Slavists (BibSlavKon)