CAI Shi-Yue, LI Qiang, ZHAO Xiao-Gang, XIA Zeng-Lu, MU Cong-Ru, LI Sen-Zhao, ZHANG Xue-Xun, ZHAO Zi-Ding, WANG Teng-Yun. The effect of sewage irrigantion on ecoenvironment and the study on its countermeasures in Beijing-Tianjin-Tangshan region[J]. Journal of Ecology and Rural Environment, 1985, 1(4): 1-5,16.