@article{Oppedahl:136694,
      recid = {136694},
      author = {Oppedahl, David B. and Hervey, Jack L.},
      title = {Ag Letter},
      journal = {AgLetter},
      address = {2002-08},
      number = {819-2016-52724},
      series = {No. 1917},
      year = {2002},
      url = {http://ageconsearch.umn.edu/record/136694},
      doi = {https://doi.org/10.22004/ag.econ.136694},
}