BibSlavKon: 326 hits for 4 on page 2

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 4 provides 326 hits
11	Vid v slavjanskich jazykach : (principy i problemy) = Ľaspect des verbes slaves : (principes et problèmes) Mazon, A. - 1958, 63 s.
12	Osnovnyje problemy izučenija obrazovanija i razvitija drevnerusskogo literaturnogo jazyka Vinogradov, V. V. - Issledovanija po slavjanskomu jazykoznaniju (1961), 4-113
13	Osnovnyje problemy izučenija obrazovanija i razvitija drevnerusskogo literaturnogo jazyka Vinogradov, V. V. - 1958, 138 s.
14	Roljata na cerkovnoslavjanskija ezik za izgraždaneto na săvremennija bălgarski knižoven ezik Andrejčin, Lj. - Bălgarski ezik : organ na Instituta za bǎlgarski ezik pri Bǎlgarskata akademija na naukite 8 (1958) 4/5, 309-320
15	The Linguistic Revival among the Slavs of the Austrian Empire, 1780-1850: the Role of Individuals in the Codification and Acceptance of New Literary Languages Auty, R. - The Modern Review 53 (1958) 3, 392-404
16	Quelques remarques sur le bilinguisme latino-polonais dans la Pologne du seizième siècle Backvis, C. - 1958, 50 s.
17	Padežnaja sistema i proischoždenije predlogov Belić, A. - Južnoslovenski filolog : povremeni spis za slovensku filologiju 22 (1957/1958) 1/4, 1-17
18	Vznik hovorové čestiny a její poměr k češtině spisovné Bělič, J. - Československé přednášky pro IV. mezinarodní sjezd slavistů v Moskvě (1958), 59-71
19	Dobrudžanskaja nadpis’ 943 goda : paleografičeskij i lingvističeskij očerk Bogdan, D. P. - Romanoslavica (1958), 88-104
20	Razviccë belaruskaj litaraturnaj movy ŭ XIX-XX st. st. va vzajemaadnosinach z inšymi slavjanskimi movami Bulachaŭ, M. H. - 1958, 44 s.

Bibliography of International Congresses of Slavists (BibSlavKon)