@article{Spillman:163535,
      recid = {163535},
      author = {Spillman, W. J.},
      title = {Use of the Exponential Yield Curve in Fertilizer  Experiments},
      address = {1933-04},
      number = {1488-2016-124877},
      series = {Technical Bulletin},
      pages = {70},
      year = {1933},
      url = {http://ageconsearch.umn.edu/record/163535},
      doi = {https://doi.org/10.22004/ag.econ.163535},
}