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Message * Articles On Chinese Astronomers, including Zhang Heng, Liu Xin, Li Fan (han Dynasty), Gan De, Jing Fang, Shi Shen, Gautama Siddha, Zu Chongzhi, Zhang Yuzhe, Zhang Daqing, Jun Chen, Yi Xing, Shen Kuo, Zhang Jiaxiang, Wang Chong - 1244231517 - 9781244231511