@misc{1185541,
  author = {Robert G Mathey and Walter J Rossiter},
  title = {Properties of 21 year old coal-tar pitch roofing membranes ::a comparison with the NBS preliminary performance criteria},
  year = {1977},
  month = {1977-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.77-1256},
  language = {en},
}