@article{Ospina:256828,
      recid = {256828},
      author = {Ospina, Enrique},
      title = {U.S. and Regional Agricultural Production Data Base},
      address = {1983-09-09},
      number = {1411-2017-695},
      series = {No. 83-2},
      pages = {32},
      year = {1983},
      url = {http://ageconsearch.umn.edu/record/256828},
      doi = {https://doi.org/10.22004/ag.econ.256828},
}