@misc{1191841,
  author = {Wilmer Souder and George C Paffenbarger},
  title = {Circular of the Bureau of Standards no. 433::physical properties of dental materials},
  year = {1942},
  month = {1942-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.433},
  language = {en},
}