@article{Morris:178072,
      author = {Morris, M.L. and Heisey, P.W.},
      title = {{Estimating the benefits of plant breeding research:  methodological issues and practical challenges}},
      journal = {Agricultural Economics: The Journal of the International  Association of Agricultural Economists},
      volume = {Volume 29},
      number = {Issue 3},
      pages = {241. - 12},
      year = {2003},
}