"Diplomatic relations" . . "Byzantine Empire Relations Bulgaria." . . "Byzantinisches Reich." . . . . "Electronic books." . . "POLITICAL SCIENCE / Government / International" . . "International relations." . . "Außenpolitik." . . "Byzantine Empire Foreign relations 527-1081." . . "Bulgaria Relations Byzantine Empire." . . "POLITICAL SCIENCE / International Relations / General" . . . . . . . . . . . . . . . . . . . . "Drawing on written and material sources, the book offers a comprehensive analysis of Byzantium's relations with Bulgaria during the late eighth and early ninth centuries, one of the most crucial and formative periods in the history of both medieval states."@en . . . . . . . . . . . "History"@en . "History" . . . "Byzantium and Bulgaria, 775-831"@en . "Byzantium and Bulgaria, 775-831" . . . . . . . . "Byzantium and Bulgaria, 775 - 831" . . . . . . . . "Electronic books"@en . . . "Byzantine Empire" . . "Bulgaria" . . "Bulgarien." . . "Political Science." . . "Geschichte 775-831." . . "Imperio Bizantino" . . "History." . . "Bulgaria History To 1393." . . "Empire byzantin" . . "Impero d'Oriente" . . "To 1393" . . "Bulgarie" . .