@article{Oppedahl:136725,
      recid = {136725},
      author = {Oppedahl, David B.},
      title = {Ag Letter},
      journal = {AgLetter},
      address = {2007-08},
      number = {819-2016-52729},
      series = {No. 1937},
      year = {2007},
      url = {http://ageconsearch.umn.edu/record/136725},
      doi = {https://doi.org/10.22004/ag.econ.136725},
}