BibSlavKon: 687 hits for 7 on page 22

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 7 provides 687 hits
211	Udio franjevačke književnosti XVIII vijeka u stvaranju literarnog jezika zapadnog srpsko-hrvatskog područja Kuna, H. - Književni jezik (1972) 3/4, 41-61
212	Problème des emprunts tchèques en „consonne + r“ et „consonne + er“ Millet, Y. - Communications de la délégation française (1973), 315-322
213	Tipovi književnog jezika kod Srba u drugoj polovini XVIII i početkom XIX veka Mladenović, A. - Referati za VII međunarodni kongres slavista u Varšavi (1973), 39-53
214	Odnos iliraca prema kontinuitetu hrvatskoga književnog jezika Moguš, M. - Prilozi (1973), 99-102
215	Loanwords in the Two Variants of Serbo-Croatian Mønnesland, S. - Scando-Slavica (1973), 197-205
216	Quelques aspects du polonais littéraire ďaprès 1945 Pankowski, M. - Communications présentées par les slavisants de Belgique au VIIe Congrès International de Slavistique = Bijdragen van de Belgische Slavisten : Varsovie - Août 1973 (1973), 97-111
217	Narodni jezik u književnosti srpskohrvatskog jezičkog područja u predvukovskom periodu sa posebnim osvrtom na bosansko-hercegovačke prilike Peco, A. - Prilozi za književnost, jezik, istoriju i folklor (1973), 58-72
218	Nekotoryje nabljudenija nad reč’ju russkich, živuščich v Australii Pobie, V. - Melbourne Slavonic Studies : the organ of the Australia and New Zealand Slavists’ Association (1972), 90-96
219	Grčkoslovenska kulturna tradicija i Vukov jezik Radošević, N. - Prilozi za književnost, jezik, istoriju i folklor (1973), 48-57
220	Tendence vývoje české výslovnostní normy Romportl, M.; Novotná, J.; Buchtelová, R. - Československé přednášky pro VII. mezinárodní sjezd slavistů ve Varšavě (1973), 233-239

Bibliography of International Congresses of Slavists (BibSlavKon)