@article{IR,
      author = {Ward, Karen},
      url = {http://digitalcollections.ohsu.edu/record/3908},
      title = {Air traffic control communication at Portland  International Airport: July 1, 1990},
      abstract = {cse-90-025},
      number = {IR},
      doi = {https://doi.org/10.6083/dr26xx63g},
      recid = {3908},
      address = {1990},
}