@misc{1191556,
  author = {I C Schoonover},
  title = {Circular of the Bureau of Standards no. 497::},
  year = {1950},
  month = {1950-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.497},
  language = {en},
}