@article{IR,
      author = {Maier, David},
      url = {http://digitalcollections.ohsu.edu/record/3835},
      title = {PIQUE: a relational query language without relations},
      abstract = {cse-87-003},
      number = {IR},
      doi = {https://doi.org/10.6083/wd375w67m},
      recid = {3835},
      address = {1987},
}