Xizhen, Zhang
Miyun survey of radio sources / by Zhang Xizhen and Zheng Yijia - Beijing : Science Press, 1996. - v, 348 p. : ill. ;
Radio sources (Astronomy)
Miyun survey of radio sources / by Zhang Xizhen and Zheng Yijia - Beijing : Science Press, 1996. - v, 348 p. : ill. ;
Radio sources (Astronomy)