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天津市农区地下水硝酸盐污染现状调查与评价
余淼 李瑜
Investigation and Evaluation on Nitrate Concentration Status of Groundwater in Rural Areas of Tianjin
中国农学通报 . 2014, (20): 219 -222 .  DOI: 10.11924/j.issn.1000-6850.2013-2202