Settlement dates to ca. 6500 to 3800 BC. It gave the name to the period. This term was coined at a conference in Baghdad in 1930.
- Harry R. Hall et C. Leonard Woolley, Ur Excavations, vol. I (Al-‘Ubaid), Oxford 1927
- Pinhas Delougaz, "A Short Investigation of the Temple at Al-‘Ubaid", Iraq 3 (1938), p. 1-11.