Bibliography of International Congresses of Slavists (BibSlavKon)

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 Levin, Jules F. provides 2 hits
1	The North Slavic-Lithuanian Contact Area : Mutual Influence and Resistance Levin, Jules F. - American Contributions to the 13th International Congress of Slavists : Ljubljana, August 2003 (2003), 139–148
2	Ongoing Change in Russian Dialects in Light of Contemporary Sociolinguistics Levin, Jules F. - American Contributions to the Eighth International Congress of Slavists : Zagreb and Ljubljana, September 3-9, 1978 (1978), 449-464

Bibliography of International Congresses of Slavists (BibSlavKon)

The North Slavic-Lithuanian Contact Area : Mutual Influence and Resistance

Ongoing Change in Russian Dialects in Light of Contemporary Sociolinguistics