@article{Sloan:286636,
      recid = {286636},
      author = {Sloan, Roby},
      title = {Agricultural Letter},
      journal = {Agricultural Letter},
      address = {1964-01-31},
      series = {737},
      month = {Jan},
      year = {1964},
      url = {http://ageconsearch.umn.edu/record/286636},
      doi = {https://doi.org/10.22004/ag.econ.286636},
}