@article{226346,
      author = {Choa, William W.F.},
      url = {http://digitallibrary.un.org/record/226346},
      title = {The relevance of market structure to technological  progress : a case study of the chemical industry /},
      publisher = {UN,},
      recid = {226346},
      pages = {iii, 56 p. :},
      address = {Geneva :. 1993-11},
      year = {1993},
      month = {Nov},
}