@misc{1191576,
  author = {Philip J Franklin and Wilbur C Nyberg},
  title = {Circular of the Bureau of Standards no. 493::development of the National Bureau of Standards casting resin},
  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.493},
  language = {en},
}