TY - JOUR AU1 - Zhang, W.L. AU2 - Tian, Z.X. AU3 - Zhang, N. AU4 - Li, X.Q. AU5 - TI - Nitrate pollution of groundwater in northern China JF - Agriculture, Ecosystems & Environment DO - 10.1016/0167-8809(96)01052-3 DA - 1996-10-01 UR - https://www.deepdyve.com/lp/crossref/nitrate-pollution-of-groundwater-in-northern-china-tTFDuFPA00 SP - 223 EP - 231 VL - 59 IS - 3 DP - DeepDyve ER -