Earliest Lower Nubian polity, contemporary with predynastic Egypt and possibly an early monarchy at Qustul.
Destroyed or displaced c. 2900 BCE when pharaohs of Egypt's First Dynasty conquered Lower Nubia, apparently depopulating the region; no archaeological remains of native Lower Nubians survive for the next several centuries until the C-Group settled the area.
The current authoritative survey of ancient Nubia, from the A-Group and Kerma through Kush and Meroe.
UNESCO's volume on ancient African civilizations, covering early Nubia (broad context).
Authoritative survey of Nubian cultures including A-Group; fills gap between Welsby (Kush-focused) and UNESCO volume