@article{Benjamin:287020,
      recid = {287020},
      author = {Benjamin, Gary L.},
      title = {Agricultural Letter},
      journal = {Agricultural Letter},
      address = {1971-08-06},
      series = {1129},
      month = {Aug},
      year = {1971},
      url = {http://ageconsearch.umn.edu/record/287020},
      doi = {https://doi.org/10.22004/ag.econ.287020},
}