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| Gnomon shadow lengths recorded in the Zhoubi Suanjing:the earliest meridian observations in China? | |
| 作者单位： | Yong Li(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China);Xiao-Chun Sun(National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;Institute for the History of Natural Science, Chinese Academy of Sciences, Beijing 100010, China) |
| 摘 要： | |
| 本文献已被 万方数据 等数据库收录！ | |