@article{ETD,
      school = {M.S.},
      author = {Howell, Farley J.},
      url = {http://digitalcollections.ohsu.edu/record/1324},
      title = {Oregon air ambulance services},
      number = {ETD},
      doi = {https://doi.org/10.6083/M47942VN},
      recid = {1324},
      address = {1986},
}