 | Hugh Thurston - 1994 - عدد الصفحات: 316
The earliest investigations that can be called scientific are concerned with the sky: they are the beginnings of astronomy. Many early civilizations produced astronomical texts ... | |
 | Hugh Thurston - 1994 - عدد الصفحات: 288
The earliest investigations that can be called scientific are concerned with the sky: they are the beginnings of astronomy. Many early civilizations produced astronomical texts ... | |
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