3Xia Zhiguo, Cao Ying, Chen Jingying, Li Weihua, Jin Zhenyu, Wang Shubao, Liu Xiao, Wang Min (National Astronomical Observatories, The Chinese Academy of Sciences, Beijing 100012, China) (Beijing Astronomical Observatory, The Chinese Academy of Science.Observations and Research on the Solar Radio Spectrum at Yunnan Observatory[J].天文研究与技术,1999(S1):410-413.