Bibliography of International Congresses of Slavists (BibSlavKon)
The Bibliography of International Congresses of Slavists (1929-2013) was converted from thirteen printed volumes into a database in cooperation with the Slavonic Library in Prague (Slovanská knihovna Praha) and contains 7767 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 Slavic Literatures of 18th and 19th Century provides 56 hits
Windle, Kevin; Ireland, Rosh; Rode, Andrei - Australian Slavonic and East European Studies : (Formerly Melbourne Slavonic Studies) : Journal of the Australian and New Zealand Slavists Association and of the Australasian Association for the Study of Communist and Post-Communist Societies 12 (1998) 1, 81-95