BibSlavKon: 2 hits for U0634

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 U0634 provides 2 hits
1	Unifikacionni procesi v bălgarskija knižoven ezik prez părvite dve desetiletija sled osvoboždenieto Andrejčin, Lj. - Bălgarski ezik : organ na Instituta za bălgarski ezik pri Bălgarskata akademija na naukite 23 (1973) 5, 371-375
2	Some Theories Concerning the Unification of the Endings of the Dative, Instrumental and Locative Plural of Russian Nouns Thomas, G. - Canadian Contributions to the Seventh International Congress of Slavists : Warsaw, August 21-27, 1973 (1973), 227-235

Bibliography of International Congresses of Slavists (BibSlavKon)

Unifikacionni procesi v bălgarskija knižoven ezik prez părvite dve desetiletija sled osvoboždenieto

Some Theories Concerning the Unification of the Endings of the Dative, Instrumental and Locative Plural of Russian Nouns