000K  utf8
1500  fre
4000  Reports [by the Russian Envoy Extraordinary and Minister Plenipotentiary to the Ottoman Porte, Iakov Ivanovich Bulgakov,] to [Empress] Catherine II (nos. 51–54)
4000  Реляции Екатерине II (№№ 51–54)
4060  26
4961  https://ditav.gbv.de/receive/lod_mods_00000754