BibSlavKon: 3 hits for Grigor'jev, A.

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 Grigor'jev, A. provides 3 hits
1	Obrazovanije glavnych češskich narečij v svjazi s istorijej drevnich češsko-serbskich plemen Grigor'jev, A. - Saopštenja i referati : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Communications et rapports : IIIème congrès international des slavistes (philologues slaves) (1939), 26-28
2	Obrazovanije glavnych narečij poľskago jazyka v svjazi s istorijej poľskich, finskago i russkich plemen, vošedšich v sostav poľskago naroda Grigor'jev, A. - Saopštenja i referati : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Communications et rapports : IIIème congrès international des slavistes (philologues slaves) (1939), 21-23
3	Obrazovanije slovackich narečij vsledstvije vlijanija češskich govorov na russkije Grigor'jev, A. - Saopštenja i referati : III međunarodni kongres slavista (slovenskih filologa) : 18.–25.IX.1939 = Communications et rapports : IIIème congrès international des slavistes (philologues slaves) (1939), 24-25

Bibliography of International Congresses of Slavists (BibSlavKon)

Obrazovanije glavnych češskich narečij v svjazi s istorijej drevnich češsko-serbskich plemen

Obrazovanije glavnych narečij poľskago jazyka v svjazi s istorijej poľskich, finskago i russkich plemen, vošedšich v sostav poľskago naroda

Obrazovanije slovackich narečij vsledstvije vlijanija češskich govorov na russkije