@article{Sloan:286895,
      recid = {286895},
      author = {Sloan, Roby},
      title = {Agricultural Letter},
      journal = {Agricultural Letter},
      address = {1969-01-31},
      series = {998},
      month = {Jan},
      year = {1969},
      url = {http://ageconsearch.umn.edu/record/286895},
      doi = {https://doi.org/10.22004/ag.econ.286895},
}