van der Waerden, B. L. (1951). "Babylonian Astronomy. III. The Earliest Astronomical Computations". Journal of Near Eastern Studies. 10 (1): 20–34. doi:10.1086/371009. JSTOR542419. S2CID222450259.
van der Waerden, B. L. (1951). "Babylonian Astronomy. III. The Earliest Astronomical Computations". Journal of Near Eastern Studies. 10 (1): 20–34. doi:10.1086/371009. JSTOR542419. S2CID222450259.
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van der Waerden, B. L. (1951). "Babylonian Astronomy. III. The Earliest Astronomical Computations". Journal of Near Eastern Studies. 10 (1): 20–34. doi:10.1086/371009. JSTOR542419. S2CID222450259.