@article{ETD,
      school = {Ph.D.},
      author = {Butterfield, Patricia G.},
      url = {http://digitalcollections.ohsu.edu/record/1104},
      title = {Occupational and environmental antecedents of young-onset  Parkinsons disease},
      number = {ETD},
      doi = {https://doi.org/10.6083/M42Z13N7},
      recid = {1104},
      address = {1992},
}