@article{ETD,
      recid = {1289},
      author = {Birdwell, David J.},
      title = {A mechanical model for the resolution of forces produced  by symmetric and asymmetric headgear},
      school = {Certificate in Orthodontics},
      address = {1987},
      number = {ETD},
      url = {http://digitalcollections.ohsu.edu/record/1289},
      doi = {https://doi.org/10.6083/M4RF5S67},
}