@Misc{BVPB20101047217, title = "Tabula exhibens cursum Fluvii Irtisch ab Omskaja Krepost Usque and Tobolsk [Mapa]", author = "Islenieff, Johanne", publisher = "[URSS : s.n.]", editor = "s.n.]", URL = "https://bvpb.mcu.es/es/consulta/registro.do?id=441267", year = "1780", }