@misc{1173546,
  author = {Percy H Walker and EF Hickson},
  title = {Letter Circular 422::the painting of structural metal (steel, galvanized metal, tin plate and copper)},
  year = {1934},
  month = {1934-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.LCIRC.422},
  language = {en},
}