@article{Oppedahl:136724,
      recid = {136724},
      author = {Oppedahl, David B.},
      title = {Ag Letter},
      journal = {AgLetter},
      address = {2007-05},
      number = {819-2016-52726},
      series = {No. 1936},
      year = {2007},
      url = {http://ageconsearch.umn.edu/record/136724},
      doi = {https://doi.org/10.22004/ag.econ.136724},
}