000K  utf8
1500  fre
1500  rus
4000  Reports [by the Russian Envoy Extraordinary and Minister Plenipotentiary to the Ottoman Porte, Iakov Ivanovich Bulgakov,] to [Empress] Catherine II (nos. 21–24)
4000  Реляции Екатерине II(№№ 21–24)
4060  25
4961  https://ditav.gbv.de/receive/lod_mods_00000730