@misc{1197976,
  author = {Raymond A Grill and Duane A Johnson},
  title = {Post-construction modifications to fire protection and life safety systems of the World Trade Center towers:},
  year = {2005},
  month = {2005-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.NCSTAR.1-1h},
  language = {en},
}