@misc{1193056,
  author = {Leo J Waldron and Hubert R Snoke},
  title = {Roofing in the United States ::results of a questionnaire},
  year = {1940},
  month = {1940-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.BMS.57},
  language = {en},
}