BibSlavKon: 326 hits for 4 on page 16

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
151	Leskov and Russia’s Slavic Brethren Edgerton, W. B. - American Contributions to the Fourth International Congress of Slavicists : Moscow, September 1958 (1958), 51-76
152	Leskov and Russia’s Slavic Brethren Edgerton, W. B. - 1958, 26 s.
153	Zum Begriff der „Gattungen“ in der altrussichen Literatur Jagoditsch, R. - Wiener Slavistisches Jahrbuch (1957/1958), 113-137
154	Nekotoryje zadači izučenija vtorogo južnoslavjanskogo vlijanija v Rossii Lichačev, D. S. - 1958, 68 s.
155	Nekotoryje zadači izučenija vtorogo južnoslavjanskogo vlijanija v Rossii Lichačev, D. S. - Issledovanija po slavjanskomu literaturovedeniju i foľkloristike (1960), 95-151
156	Vzaimootnošenija meždu russkim letopisanijem i russkim narodnym eposom Stief, C. - Scando-Slavica (1958), 59-69
157	Voprosy razvitija socialističeskogo realizma v sovetskoj literature (russkoj i ukrainskoj) Ščerbina, V. R. - 1958, 89 s.
158	Voprosy razvitija socialističeskogo realizma v sovetskoj literature (russkoj i ukrainskoj) Ščerbina, V. R. - Issledovanija po slavjanskomu literaturovedeniju i stilistike (1960), 280-337
159	Slavjane v Kanade Weir, J. - Slavjane 17 (1958) 10, 23-25
160	Hlavní úkoly historickosrovnávacího zkoumání slovanských literatur Wollman, F. - Slavia 27 (1958) 2, 209-215

Bibliography of International Congresses of Slavists (BibSlavKon)