TY - CHAP TI - Social Change in early medieval Byzantium T2 - Lordship and learning: studies in memory of Trevor Aston AU - Howard-Johnston, James D. A2 - Evans, Ralph A2 - Aston, T. H. PB - Boydell Press PY - 2004 CY - Woodbridge, Suffolk CY - Rochester, NY EP - 50 SP - 39 SN - 1843830795 U3 - b1453848 ER -