@misc{1173446,
  author = {Clara Sentel},
  title = {Letter Circular 915::painting exterior walls of porous masonry (superseding Letter Circular 747)},
  year = {1948},
  month = {1948-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.LCIRC.915},
  language = {en},
}