[c] Eduard Meyer, Geschichte des Alterthums.
[d] F. Hommel, Geschichte Babyloniens und Assyriens.
[e] R. W. Rogers, History of Babylonia and Assyria.
[f] J. P. Peters, Nippur.
Chapter II. Old Babylonian History
[b] Hugo Radau, Early Babylonian History down to the IVth Dynasty of Ur.
[c] A. H. Sayce, from the article “Babylonia and Assyria,” in the New Volumes of the Ninth Edition of the Encyclopædia Britannica.
d E. A. T. W. Budge, Babylonian Life and History.