@article{ETD,
      school = {M.S.},
      author = {Pappin, John B.},
      url = {http://digitalcollections.ohsu.edu/record/1461},
      title = {Biologic sealing of the apex in endodontically treated  human teeth},
      publisher = {Oregon Health Sciences University},
      number = {ETD},
      doi = {https://doi.org/10.6083/M4D798MR},
      recid = {1461},
      address = {1982},
}