@misc{1166866,
  author = {Selden D Cole and Paul R Achenbach},
  title = {A study of standard test procedures for soiling acoustic tile:},
  year = {1959},
  month = {1959-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.RPT.6387},
  language = {en},
}