TY - Journal of Yangtze River Scientific Research Institute A1 - LI Li, REN Fei-peng, WANG Zhi-gang, ZHANG Ping-cang T1 - A Review on Identifying Agricultural NPS Pollution Sources by Using Stable N Isotope Y1 - 2014-07-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 21 EP - 28 VL - 31 IS - 7 UR - http://ckyyb.crsri.cn N1 - 10.3969/j.issn.1001-5485.2014.07.004 ER -