@article{Singer:136635,
      recid = {136635},
      author = {Singer, Mike A.},
      title = {Ag Letter},
      journal = {AgLetter},
      address = {1998-11},
      number = {819-2016-52652},
      series = {No. 1902},
      year = {1998},
      url = {http://ageconsearch.umn.edu/record/136635},
      doi = {https://doi.org/10.22004/ag.econ.136635},
}