@misc{1173501,
  author = {EF Hickson and WC Porter},
  title = {Letter Circular 831::the painting of exterior metal surfaces (superseding Letter Circular 422)},
  year = {1946},
  month = {1946-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.LCIRC.831},
  language = {en},
}