@misc{1182386,
  author = {Robert E Berger},
  title = {A mathematical model for use in evaluating and developing impact test methods for protective headgear:},
  year = {1980},
  month = {1980-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.80-1987},
  language = {en},
}