@article{Sloan:286837,
      recid = {286837},
      author = {Sloan, Roby},
      title = {Agricultural Letter},
      journal = {Agricultural Letter},
      address = {1967-12-22},
      series = {940},
      month = {Dec},
      year = {1967},
      url = {http://ageconsearch.umn.edu/record/286837},
      doi = {https://doi.org/10.22004/ag.econ.286837},
}