@misc{1126231,
  author = {Sidney H Greenfeld},
  title = {Hail resistance of roofing products:},
  year = {1969},
  month = {1969-01-01 05:01:00},
  publisher = {Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.BSS.23},
  language = {en},
}