@article{Oppedahl:136713,
      recid = {136713},
      author = {Oppedahl, David B.},
      title = {Ag Letter},
      journal = {AgLetter},
      address = {2005-05},
      number = {819-2016-52629},
      series = {No. 1928},
      year = {2005},
      url = {http://ageconsearch.umn.edu/record/136713},
      doi = {https://doi.org/10.22004/ag.econ.136713},
}