@article{Sloan:286911,
      recid = {286911},
      author = {Sloan, Roby},
      title = {Agricultural Letter},
      journal = {Agricultural Letter},
      address = {1969-05-23},
      series = {1014},
      month = {May},
      year = {1969},
      url = {http://ageconsearch.umn.edu/record/286911},
      doi = {https://doi.org/10.22004/ag.econ.286911},
}