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©The Author(s) 2003.
World J Gastroenterol. Jun 15, 2003; 9(6): 1187-1190
Published online Jun 15, 2003. doi: 10.3748/wjg.v9.i6.1187
Published online Jun 15, 2003. doi: 10.3748/wjg.v9.i6.1187
Table 2 Farming use of nitrogen fertilizer (kg/hectare) in Cixian County and Chichen County from 1991 to 1996
- Citation: Zhang XL, Zhang B, Zhang X, Chen ZF, Zhang JZ, Liang SY, Men FS, Zheng SL, Li XP, Bai XL. Research and control of well water pollution in high esophageal cancer areas. World J Gastroenterol 2003; 9(6): 1187-1190
- URL: https://www.wjgnet.com/1007-9327/full/v9/i6/1187.htm
- DOI: https://dx.doi.org/10.3748/wjg.v9.i6.1187