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Brown, David R., Fermor, John, & Walker, Christopher B.F., “The Water Clock in Mesopotamia.” Archiv für Orientforschung, 46/47 (1999/2000)

Chadwick, R. “The Origins of Astronomy and Astrology in Mesopotamia.” Archaeoastronomy. BULL. CTR ARCH. V. 7:1-4, P. 89, 1984. KNUDSEN Bibliographic Code: 1984BuCAr...7...89C

Fermor, John, “Timing the Sun in Egypt and Mesopotamia.” Vistas in Astronomy, 41 (1997), 157-167. Elsevier Science. DOI: 10.1016/S0083-6656(96)00069-4.

Walker, Christopher and Britton, John. “Astronomy and Astrology in Mesopotamia.” BMP, 1996 (especially pp. 42-67)