000K  utf8
1500  ger
4000  Three messages from [the Tsar of Russia,] Peter I, to Christian V, King of Denmark [and Norway], on alliance and friendship; No. 53: Two letters from Tsar Peter [I] Alekseevich [of Russia] to King Christian V of Denmark [and Norway]
4000  Послания /3/ Петра I к Христиану V, королю Дании, о союзе и дружбе; N 53 Zwey Schreiben des Zaars Peter Alexeevitz an den König von Dänemark Christian [den] 5te[n]
4060  18
4961  https://ditav.gbv.de/receive/lod_mods_00000512
5550  Russian-Danish anti-Swedish alliance