@article{244506,
      url = {http://digitallibrary.un.org/record/244506},
      title = {Copper sulphate and copper sulphate solution /},
      publisher = {UN,},
      recid = {244506},
      pages = {6 p.},
      address = {Geneva :. 1997-10-01},
      year = {1997},
      month = {Oct},
}