@article{Zeng:274001,
      recid = {274001},
      author = {Zeng, Shuwei and Du, Xiaodong and Gould, Brian W.},
      title = {Environmental and Technical Efficiencies of U.S. Dairy  Farming},
      address = {2018-06-20},
      month = {Jun},
      year = {2018},
      url = {http://ageconsearch.umn.edu/record/274001},
      doi = {https://doi.org/10.22004/ag.econ.274001},
}